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【单选题】
人造地球卫星近地点离地心r1=2R,(R为地球半径),远地点离地心r2=4R。求: 卫星在近地点及远地点处的速率 1: 2
A.
2:1
B.
1:2
C.
4:1
D.
1:4
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参考答案:
举一反三
【判断题】In the UK, the dress shirt can be white or blue striped, while in the US, it is always white.
A.
正确
B.
错误
【简答题】寻找金钥匙 第三关 : 导入环节常用的方法 有很多,请分析连线以下导入案例分别采用了哪种方法 ?
【单选题】What is the main idea of paragraph 5 ?
A.
We should have more testing alternatives other than standardized ones.
B.
The effectiveness of test coaching varies from student to student.
C.
The wealthy families have the right for better education.
D.
The growing influence of test preparation is also a concern for some.
【简答题】People in the UK spend their free time in different ways. They usually use it to relax. They spend a lot of their free time at home. The most popular activity is watching TV. People in the UK watch TV...
【单选题】What's the main idea that author want to convey in this passage?
A.
There is a waste at home
B.
To waste is a serious problem
C.
Families will run out of energy.
D.
We should conserve energy.
【判断题】It can be predicted that in the foreseeable future the UK will not adopt the Euro currency.
A.
正确
B.
错误
【单选题】What’s the main idea of the passage?
A.
F oreigners are not friendly as Chinese.
B.
A fter stay ing in England for a year, the author was still not used to the English way of hospitality.
C.
The different ways to treat guests between eastern families and western.
D.
In Britain, the host or hostess usually serves the guests only one stew as the dinner.
【简答题】What’s the main idea of the passage? ___A. Cherish everything meaningful we have today B. Don’t get sick C. Keep a good company with our families D. Treasure our friends
【单选题】中小型工件上加工小孔的直径,直径一般为
A.
d≤30mm
B.
d≤40mm
C.
d≤50mm
D.
d≤60mm
【简答题】寻找金钥匙 第三关 : 导入环节常用的方法 有很多,请分析连线以下导入案例分别采用了哪种方法 ?
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