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【判断题】
黄铜含锌量大于 7% 时， 若经冷塑性变形， 由于存在残余内应力，接触大气、水、氨等介质便易产生应力腐蚀。A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】什么是假相当位温？
【单选题】Although there are a lot of difficulties on the way of brand development, Chinese enterprises will overcome them and achieve success at the end.
A.
Y
B.
N
C.
NG
【简答题】内部学习动机和外部学习动机的划分标准是（ ）。
【单选题】There are a lot of bikes here. [ ]
A.
electric
B.
electrical
C.
electrician
D.
electricity
【简答题】How many girls are there in your class? A) Yes, there are a lot of girls. B) No, they aren't. C) About 30 girls. D) About 30 boys.
【单选题】What can be inferred from this passage?
A.
There are a lot of people like Ron.
B.
There is few companies in this county.
C.
People in this county do not want to work.
D.
The county is far away from major business center.
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