The earth is not the only body that travels around the sun. With it are eight other planets, fellow members of the sun's family. Two of them, Mercury and Venus, are nearer while the other six, namely Mars, Jupiter, Saturn, Uranus, Neptune and Pluto, also in their given order from the sun, are farther from the sun than the earth is. The farther they are, the longer trips they make around the sun. People noticed long ago that these traveling bodies moved around in the sky in definite paths. It is a force called gravity that holds them in their paths. We know that every little bit of matter in the universe pulls upon every other bit of matter. The pull between two bodies is proportional to the product of their masses. Because the sun is so large the pull between the sun and the planets are thus great. If it were not for this pull, the planets would fly off into space. In the same way there exists a pull between the earth and the moon, which keeps the moon traveling in its orbit around our planet, the earth. Gravity holds you to its surface, and pulls back to it the ball which you throw into the air. Of course the ball also pulls on the larger earth but the earth is so much larger that the pull is not noticed. Now remember that large bodies exert a greater pull than smaller ones which contain less material. But each object in the universe, no matter how small, pulls on all other objects to some degree. From the sentence "The pull between two bodies is proportional to the product of their masses." We can infer that the pull between _ A) the sun and the moon is greater than between the sun and the earth B) the earth and the moon is greater than that between the sun and the earth C) the sun and the earth is greater than that between the earth and the moon D) the sun and the earth is the same as that between the earth and the moon
C
(Question)
The sound of the rain hitting the windows wakes me up and it sounds just exactly as it did 15 years ago, which reminded me of my girlhood. It was my second day of school and it was raining heavily. I could not resist the habit I had at home, so I fell asleep right at my desk. I woke up to find myself not in the classroom but carried on Dad's back. We were halfway home. It was the last time I felt close to him. After that, he never carried me or hugged me as other fathers did to their children. I was not bothered much by this thought. I was proud of it, for I felt independent and "grown up." However, there were times when I felt depressed by not having sought comfort from him. One day, I was writing Chinese characters as homework. I hated doing this more than anything. Dad came and stood behind me for a moment, watching me scratching the paper. Then he said, "This kind of writing needs patience. Your writing is not strong enough. Press harder." I follow his advice for the next two words, but as I could see little improvement, I followed my own method----the fast way. His advice did not improve my writing but our relationship. As I grew older, I found out that he had finished his schooling in Grade 6, which was the highest grade in the town then, so he was considered to be a scholar. People used to ask him to write something to put on the walls, but he never felt very useful. He often said to me, "As you can see, this family is going to count on you. We are useless to improve you anything for your future.You have to get an education to change the life for yourself." As a result of his expectation, I have made it through high school and through college. We can infer from the passage that the author's father _ . A) is helpful to improving the author for her future. B) attaches great importance to education. C) pushes the author tightly. D) received little education.
(Answer)
B
Ques: All the 6,000 medals for the 2008 Olympic Games have arrived in the capital from the Shanhai Mint,ready for their debut on August 8.For the,first time in Olympic history,the medals for the Beijing Games mix metal and jade. The technology of inlaying jade into metal can date back to the Han Dynasty almost 2,000 years ago.It is not easy to bond jade perfectly with metal.The key to the process lies in the inner layer of the metal and the groove of the jade ring.A seal ring is put between the inner layer and the groove to join the metal and jade together. Jade rings used for casting Olympic medals have been subjected to strict quality controls,and those not up to the standard have been thrown away. To make use of those jade rings that do meet the quality criteria,metal medals were produced to fit the jade tings,and more than ten different sizes of seal rings were designed. To avoiding any loosening of the jade rings due to aging of the seals,glue has been used in casting the;Olympic medals,which is a painstaking manual process. Experts from the International Olympic Committee(IOC)were concerned about the risk of fragility when the jade ring design was proposed.The IOC required that jade rings should be strong enough to withstand a 2-meter drop test.The Shanghai Mint raised that standard to 3- meters.Medals call survive a 3-meter drop test with only minor cracks on the jade rings. The medals for 2008 Olympic Games are different from those of the past games in which they _ . A) are made of pure gold B) are more valuable C) mix metal and jade D) are made in different cities
Ans: C
Ques: Everyone has done experiments in high school laboratories, but have you ever thought about designing a satellite to explore space? On Nov. 19, a team of students from Thomas Jefferson High School for Science and Technology in the US _ peers and even scientists by successfully launching a satellite. The first satellite designed and built by high school students was sent up into space along with a record-setting. 28 other small ones on a rocket were sent from a NASA center in Virginia, CNN reported. It took the students seven years to build. The students call their tiny satellite TJ3Sat, which is named after their school. It is just 10x10x12 centimeters and weighs only 0.89 kilograms, according to Orbital Sciences, a company which developed the rocket and supported the students' project. It can be controlled with a smartphone. Like most satellites, TJ3Sat can send and receive data. The small spacecraft is equipped with a voice synthesizer , which can switch text to voice and transmit those sounds back to Earth over radio waves, said Orbital officials. In this case, anyone can give it a try via the project's website (school website) by submitting a text. The texts that get approved will be sent to the satellite, changed to voice and then broadcast back to Earth via radio waves. "I can say 'Go Colonials' on our ground station and when it is on the other side of the world, in India, someone can hear 'Go Colonials'over the radio," the team explains on the website. The satellite will stay in space for at least three months. School principal Evan Glazer told The Washington Post that the project started in 2006 as an activity in the spare time. Later it became a research project for a select group of seniors. At a time when American students are busy with SATs, the launch of the satellite shows what diligent teenagers can achieve when allowed to pursue their own curiosities, Glazer said. "It used to be that kids growing up wanted to be an astronaut," Andrew Petro, program executive for small spacecraft technology... According to the article, the launch of the satellite _ . A) is evidence of the advance of spacecraft technology B) proves that hard-working teenagers can achieve a lot C) shows the importance of extracurricular activities at school D) has inspired many people to take an interest in space travel
Ans:
B