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【简答题】
图中7指的是
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皮皮学刷刷变学霸
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【简答题】Wood is becoming s______( 紧缺 )in the country and a new material must be found to replace it.
【简答题】A. It's being drained from Nebraska to Texas. B. It's being pumped out. C. It's becoming contaminated with oil D. It's becoming much warmer.
【单选题】在压力变送器调零和调量程时,错误的做法是( )。
A.
输入为零时，应使输出为0.02MPa
B.
先调零点再调量程，并反复多次
C.
扩大量程时应上移波纹管
D.
先调量程再调零点，反复多次
【单选题】In the sentence 'an area covering 30% of the earth's land surface is desert, becoming desert, or in danger of becoming desert' , the part of ' is desert, becoming desert, or in danger of becoming dese...
A.
is becoming desert, has become desert, or will becoming into desert
B.
has been desert, is becoming desert, or will become into desert
C.
is becoming desert, will become desert, or becomes into desert
D.
has been desert, is becoming desert, or will become into desert
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