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【多选题】
国家标准规定的优先、常用配合在、轴公差等级的选用上,采用“工艺等价原则”,下列说法中正确的是( )。A.
IT 8的与IT8级的轴相配
B.
IT 8的与IT7级的轴相
C.
IT 6的与IT6级的轴相配
D.
IT 6的与IT5级的轴相配
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反馈参考答案：
举一反三
【单选题】By the year of 2020, the world energy consumption is predicted to increase by______
A.
100%
B.
200%
C.
50%
D.
150%
【单选题】In China, as in many parts of the world, energy __________ is an issue which gets a lot of attention these days.
A.
preservation
B.
reservation
C.
conservation
D.
consideration
【简答题】Passage two The energy cr, which is being felt around the world, has dramatized how the careless use of the earth's resources has brought the whole world to the drink of disaster. The over develop...
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