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【单选题】
It is obvious that in machining the NC machine saves a considerable amount of time and improves the accuracy of ________.A.
rotating operation
B.
machining operation
C.
horizontal operation
D.
manual operation
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A.
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B.
There been no rain
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D.
There being no rain
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A.
have; sowed
B.
had; sowed
C.
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D.
would; sow
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A.
shrank
B.
withered
C.
decreased
D.
declined
【单选题】The American farmers worried that______.
A.
their horses would be replaced by the 'iron horse'
B.
there would be no market for their crops
C.
there would be no market for their livestock
D.
they would benefit less from railroads than from waterways
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