试题与答案

一束光线与水平面成24°角,要使反射光线沿水平方向传播,那么平面镜与水平面所成的

题型:问答题

题目:

一束光线与水平面成24°角,要使反射光线沿水平方向传播,那么平面镜与水平面所成的度数是多少?(注意作出示意图)

答案:

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Congress makes the laws in the United States. It has two parts, which are more or less equal in power. They are known as the House of Representatives and the Senate. The House of Representatives is larger than the Senate whose 100 members (two from each state) serve for six years. The 435 members of the House are elected every two years, and the number from each state is determined by the population of the state. For example, California, which has a large population, has 43 representatives, while the State of Nevada has only one.
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C. depends on the size of the state
D. depends on the location of the state

According to the Constitution of the United States, a senator must be at least 30 years old and he must have been a citizen of the United States for nine years at the time of his election. To be elected to the House a person must be 25 years old and must have been a United States citizen for seven years. At the present time, members of Congress include businessmen, farmers, teachers, and especially lawyers. In general, senators are better known than representatives because they are fewer in number and serve for a longer time. Many American presidents served in Congress before they became president.

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