Read the following article and answer the question. Article: The human body has hundreds of muscles. The three types are skeletal muscles, smooth muscles and cardiac, or heart muscles. Each kind of muscle has a special job to do. The skeletal muscles are attached to the bones; they actually hold the skeleton together. Strong cords, called tendons , help connect these muscles to the bones. Skeletal muscles give us strength and allow us to move in many ways. If you look at skeletal muscles through a microscope, you will see that it has bands of fibers that look like stripes . These stripes are called striations. Skeletal muscles usually move because the brain has sent a conscious message to them telling them what to do. This is called voluntary movement. Another type of muscle is smooth muscle. Unlike skeletal muscle, smooth muscle does not have striations. This is found in organs such as the stomach, the bladder , the lungs and the eyes. Smooth muscles are smaller than the skeletal muscles and they move involuntarily. The brain tells these muscles what to do, but we aren't even aware of it. For example, we don't have to think about breathing or digesting food. The smooth muscles just do their jobs automatically. For this reason smooth muscles are sometimes called involuntary muscles. Like smooth muscle, cardiac muscle also works involuntarily. It is a very thick muscle that is found only in the walls of the heart. Its job is to pump blood out of the heart and into blood vessels called arteries . The arteries help carry the blood to all parts of the body. When the cardiac muscles relax, they let blood back into the heart. Cardiac muscles have striations, just like skeletal muscles do. Question: Skeletal muscles and heart muscles are alike because _ . Answer:
OPTIONS:
- both can move voluntarily
- both are thick muscles
- both are bigger than smooth muscles
- both have stripes called striations
both have stripes called striations
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Read the following article and answer the question. Article: Robert Spring, a 19th century forger , was as good at his profession that he was able to make his living for 15 years by selling false signatures of famous Americans. Spring was born in England in 1813 and arrived in Philadelphia in 1858 to open a bookstore. At first he make some money by selling his small but genuine of early U.S. autographs . Discovering his ability at copying handwriting, he began imitating signatures of George Washington and Ban Franklin and writing them on the title pages of old books. To make less the chance of detection , he sent his forgeries to England and Canada for sale and circulation . Forgers have a hard time selling their products. A forger can't approach a respectable buyer but must deal with people who don't have much knowledge in the field. Forgers have many ways to make their work look real. For example, they buy old books to use the aged paper of the title page, and they can treat paper and ink with chemicals. In Spring's time, right after the Civil War, Britain was still fond of the Southern states, so Spring invented a respectable maiden lady known as Miss Fanny Jackson, the only daughter of General "Stonewall" Jackson. For several years Miss Fanny's economic problems forced her to sell a great number of letters and manuscripts belonging to her famous father. Spring had to work very hard to satisfy the demand. All this activity did not prevent Spring from dying in poverty, leaving sharp-eye experts the difficult task of separating this forgeries from the originals. Question: According to the passage, forgeries are usually sold to _ . Answer:
OPTIONS:
- sharp-eyed experts
- persons who aren't experts
- book dealers
- owner of the old books
persons who aren't experts
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Read the following article and answer the question. Article: Have you ever felt you were being watched? Some new technologies might make you feel that way. Digital billboards are being created with ability to recognize certain characteristics. These high-tech devices have cameras pointed at the people on the street, and software that tries to recognize people by age and gender. A computer inside the billboard then uses the information to display ads that are directed at the people who are looking at the billboard. For example, if a man passes a billboard featuring an ad for cosmetics, the computer can change the ad to something that is more likely to catch the man's attention, such as football games. While advertisers see this as a great opportunity to reach their target customers, some people feel that this kind of profiling is an invasion of their privacy. People are now much more aware of how information is exposed, shared, bought, and sold on the Internet. Now this debate will involve technologies such as "smart" billboards. But advertisers claim that they are sensitive to people's concerns about privacy--companies that have tested the billboards in Japan and the U.S. assure consumers that the billboards can only guess your age and gender, but they will not be able to recognize your face or obtain any personal information about you. Until recently, this kind of personal advertising has been mostly limited to the Internet. Search engines like Google and Bing can follow what we search for because each computer that connects to those sites has a unique identity. Companies then pay search engines to use this information to display ads for products and services that you have searched for. So if you search for travel information, you are likely to see ads for airlines and hotels. This kind of advertising has proven to be much more effective--and valuable--than traditional advertising. In addition to taking steps to deliver more personalized messages, advertisers are using billboards to offer more useful information. Digital billboards can connect to the Internet to... Question: Why is Google mentioned in the passage? Answer:
OPTIONS:
- It is an example of a search engine that sells information to companies.
- It is better than other search engines in gathering information.
- It has started using high-tech billboards to get information.
- It plans to develop better ways to profile Internet users.
It is an example of a search engine that sells information to companies.
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Read the following article and answer the question. Article: Ears are for hearing -- everyone knows that. But for a creature called the Cuvier's beaked whale, hearing starts in the throat, a new study found. The observation might help explain how all whales hear. The work might also help scientists understand how animals are affected by underwater sonar . This sonar, used by some ships, sends out sound waves to locate underwater objects. The Cuvier's beaked whale is a so-called toothed whale. Toothed whales dive deep into the ocean in search of food. As the whales hunt, they produce sounds that reach objects and then return to the whales. This allows the animals to "see" the shape, size, and location of objects, even when they're 1,000 meters under the sea, where it is totally dark. To better understand how the whale hears, researchers from San Diego State University in California took X-rays of two Cuvier's beaked whales. The whales had died and washed up on the beach. Ted Cranford and his colleagues used the images to make a computer model of a Cuvier's beaked whale's head. Then, they modeled the process of sound traveling through the head. The researchers knew that some sounds get to the ears of a toothed whale through a structure called "the window for sound". Found on the lower jaw, this structure is very thin on the outside and has a large pad of fat on the inside. When the researchers used their computer model to work out how sound waves travel in the whale's head, they were surprised to find that sounds coming from right in front of the whale actually travel under the animal's jaw. From there, sound waves move through the throat, into a hole in the back of the jaw, and finally to the pad of fat near the animal's ears. Cranford guesses that other types of whales may hear through their throats. Further testing is needed to be sure. Eventually, the insight into how whales hear might explain whether sonar testing by military ships is causing the animals to wind up on beaches. Question: Toothed whales look for food under the sea by _ . Answer:
OPTIONS:
- watching the shape and size of their objects
- diving deep into the sea
- sending and receiving sounds
- making lots of noises
sending and receiving sounds
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