问题
单项选择题
到目前为止，人类成功发射了4000多颗卫星，这些卫星大多数用于（）
A.军事目的
B.通讯目的
C.科研目的
D.气象观测
答案
参考答案：A
解析：卫星依用途可分为科学卫星、通信卫星、军事卫星、气象卫星等。军事卫星是作为军事照相、侦察之用的卫星。目前人类发射的卫星多用于军事目的。故本题选A。
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到目前为止，人类成功发射了4000多颗卫星，这些卫星大多数用于（）
A.军事目的
B.通讯目的
C.科研目的
D.气象观测
参考答案：A
解析：卫星依用途可分为科学卫星、通信卫星、军事卫星、气象卫星等。军事卫星是作为军事照相、侦察之用的卫星。目前人类发射的卫星多用于军事目的。故本题选A。
Friends are very important in people’s lives．Some friends have views and interests．And like the same things．Should friends be different the same? I don’t care．I have two best friends,Wang Lei and Lin Ying.Wang Lei like me.I am than most of the students in my class and Wang Lei is also quiet.And we both enjoy ．On weekends we often go to the library to do some reading．But the other best friend of mine，Lin Ying，is different from me．She is much more outgoing（开朗的）．She likes and often makes me laugh．She also likes ，so she is more athletic（运动的，体育的）． I don’t think differences are important in a ．What’s your opinion?
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