Here is a question about this article: The word madrasah derives from the triconsonantal Semitic root -- D-R-S 'to learn, study', through the wazn (form/stem) (); mafal(ah), meaning "a place where something is done". Therefore, madrasah literally means "a place where learning and studying take place". The word is also present as a loanword with the same innocuous meaning in many Arabic-influenced languages, such as: Urdu, Bengali, Hindi, Persian, Turkish, Azeri, Kurdish, Indonesian, Malay and Bosnian / Croatian. In the Arabic language, the word madrasah simply means the same as school does in the English language, whether that is private, public or parochial school, as well as for any primary or secondary school whether Muslim, non-Muslim, or secular. Unlike the use of the word school in British English, the word madrasah more closely resembles the term school in American English, in that it can refer to a university-level or post-graduate school as well as to a primary or secondary school. For example, in the Ottoman Empire during the Early Modern Period, madaris had lower schools and specialised schools where the students became known as danismends. The usual Arabic word for a university, however, is (jamiah). The Hebrew cognate midrasha also connotes the meaning of a place of learning; the related term midrash literally refers to study or learning, but has acquired mystical and religious connotations.
What is the answer to this question: During the Ottoman Empire, what types of schools were typical?
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So... lower schools and specialised

Here is a question about this article: Chinese troops suffered from deficient military equipment, serious logistical problems, overextended communication and supply lines, and the constant threat of UN bombers. All of these factors generally led to a rate of Chinese casualties that was far greater than the casualties suffered by UN troops. The situation became so serious that, on November 1951, Zhou Enlai called a conference in Shenyang to discuss the PVA's logistical problems. At the meeting it was decided to accelerate the construction of railways and airfields in the area, to increase the number of trucks available to the army, and to improve air defense by any means possible. These commitments did little to directly address the problems confronting PVA troops.
What is the answer to this question: Did the UN troops or Chinese troops experience more war casualties?
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So... Chinese troops

Here is a question about this article: A few lines of the Paris Metro in France operate on a four-rail power scheme because they run on rubber tyres which run on a pair of narrow roadways made of steel and, in some places, concrete. Since the tyres do not conduct the return current, the two guide rails provided outside the running 'roadways' double up as conductor rails, so at least electrically it is a four-rail scheme. One of the guide rails is bonded to the return conventional running rails situated inside the roadway so a single polarity supply is required. The trains are designed to operate from either polarity of supply, because some lines use reversing loops at one end, causing the train to be reversed during every complete journey. The loop was originally provided to save the original steam locomotives having to 'run around' the rest of the train saving much time. Today, the driver does not have to change ends at termini provided with such a loop, but the time saving is not so significant as it takes almost as long to drive round the loop as it does to change ends. Many of the original loops have been lost as lines were extended.
What is the answer to this question: What is required in order for the guide rails to operate properly?
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So...
a single polarity supply