题目内容
在测量工作中,如没有特殊说明的话,直线方位角一般是指以坐标纵轴方向作为标准方向的坐标方位角。
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一条直线的正反方位角相差180°。
Section DDirections: In this section you will hear a recorded short passage. The passage is printed in the test paper, but with some words or phrases missing. The passage will be read three times. During the second reading, you are required to put the missing words or phrases on the Answer Sheet in order of the numbered blanks according to what you hear. The third reading is for you to check your writing. Now the passage will begin.More and more people today are realizing the importance of regular physical exercise. Physical exercise can make you strong and (16) . By doing some from of physical exercise every day, your level of energy will (17) and you will sleep better at night. There are many different forms of physical exercises that suit different tastes and (18) of different people. Take track and field events for example. (19) the javelin（标枪） can strengthen your arm and upper body. The long jump and high jump can strengthen your legs. Basketball, football and volleyball are also good forms of exercise. Be (20) when choosing the right type of exercise for yourself. If your heart is weak, for example, you should start with some light exercise. If you are overweight, know your limits. In a word, don’t overdo it.
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