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【多选题】
Which one of these are Scottish inventions?
A.
pneumatic car tire
B.
tubular steel
C.
falkirk wheel
D.
steam hammer
E.
wire rope
F.
cordite
G.
telephone
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【简答题】Listed below are the top steel-producing regions for the year 2009. Index for US
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A.
正确
B.
错误
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A.
正确
B.
错误
【简答题】,2和-2叫作16的4次方根,16的4次方根有两个,记作 和- , 所以 =2,- =-2, , 和 叫作81的 4 次方根,81的4次方根有两个,记作 和- , 所以 = ,- =
【判断题】为了检验挂篮的性能和安全,并消除结构的非弹性变形,应对挂篮试压。
A.
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B.
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【简答题】Listed below are the top steel-producing regions for the year 2009. Express the amount produced by China as an index, using the United States as a base.
【简答题】Listed below are the top steel-producing regions for the year 2009. Express the amount produced by Japan as an index, using the United States as a base.
【单选题】A shoe retailer keeps track of all types of information about sales of newly released shoe styles. One newly released style was marketed to tall people. Listed below are the shoe sizes of 12 randomly ...
A.
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