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【判断题】
GPS是我国自主研发的卫星导航系统A.
正确
B.
错误
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】lt's so cold outside. Put on more clothes. They can _____ the cold. [ ]
A.
keep on
B.
keep out
C.
keep up
D.
keep away
【单选题】W hich of the following is mentioned in your textbook as a guideline for effective informative speaking?
A.
Avoid talking about your personal experiences.
B.
U se chronological organization whenever possible.
C.
R elate to the audience by speaking in technical terms.
D.
Don’t overestimate what the audience knows.
【简答题】A.cater for B.cater with C.keep up D.keep out
【简答题】When the mixture is used, it is important to _________ [ A] keep sugar and salt in water [ B ] drink it as often as necessary [ C] take it as much as possible [ D]use it to kill the bacteria
【简答题】什么是系统误差？产生系统误差的原因是什么？如何发现系统误差？减少系统误差有哪几种方法？
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