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【多选题】
电容传感器可以用于很多物理量测量,下面可以用电容传感器测量的是( )。A.
长度
B.
质量
C.
加速度
D.
角度
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举一反三
【单选题】— When did you buy the car? — In November. I ______ it for two months. [ ]
A.
bought
B.
have bought
C.
have had
【单选题】– What a nice bicycle! – Thanks. I ________ it for two months.
A.
have bought
B.
bought
C.
have had
【简答题】流体流动的连续性方程是 ;适用于圆形直管的不可压缩流体流动的连续性方程为 。
【单选题】-----I bought this dictionary two weeks ago. ----You mean you __________ it for half a month.
A.
have kept
B.
have had
C.
have bought
D.
have taken
【简答题】一维流动的连续性方程υA=C成立的必要条件是______。 A理想流体；B黏性流体；C可压缩流体；D不可压缩流体。
【单选题】—When _____ you _____ this book? —I ____ it for two weeks.
A.
have; bought; have had
B.
did; buy; have had
C.
have; bought; bought
D.
did; buy; have bought
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