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【单选题】

碳素钢管膨胀不能超过原直径的()。

A.
1.5%
B.
2.5%
C.
3.5%
D.
4.5%
举报
参考答案:
参考解析:
.
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【多选题】目前钢管杆主要有( )

A.
圆管钢管杆
B.
三角形钢管杆
C.
多边形钢管杆
D.
椭圆形钢管杆

【单选题】How should one invest a sum of money in these days of inflation (通货膨胀) Left in a bank it will hardly keep its value, however high the interest rate is. Only a brave man, or a very rich one, dares to b...

A.
suggest human beings are controlled by a clock
B.
describe why clocks can rule the planet Earth
C.
tell readers what clocks look like
D.
compare clicks to human beings