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【判断题】
根据碳当量法判断低合金结构钢的焊接性时，当碳当量小于0.4%时，焊接性良好，当碳当量大于0.6%时，焊接性很差。A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】大容量的程控数字交换机几乎全部采用时分或______的交换网络。
【单选题】If you want to save money．you call buy clothes that need to be dry-cleaned．
A.
Right．
B.
Wrong．
C.
Doesn’t Say．
【单选题】Which is not mentioned by the teacher that you need to prepare for an out-going call?
A.
A list of things you need to say.
B.
A telephone directory.
C.
A telephone message form or some paper.
D.
Some money.
【单选题】What does not need to be a consideration before you make a phone call?
A.
Who you are calling.
B.
The purpose of your call.
C.
The best time to call.
D.
A brief joke to break the ice.
【单选题】－The Greens are not here. If you need help, you should __________. －Sure.
A.
call him up
B.
call up him
C.
call them up
D.
call up them
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