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【单选题】
You really don't know what we ______ while we were working on this project .A.
went through
B.
go through
C.
go across
D.
go down
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【单选题】A micrometer with ∆ ins =0.004mm is used to measure the diameter of a steel ball only once, what is the absolute uncertainty of the measured result?
A.
0.004 mm
B.
0.1 mm
C.
0.2 mm
D.
0.5mm
【简答题】A mercury manometer at 21.1(°C) reads 26.5 (cm). The local acceleration of gravity is 9.79(m)/(s)2. The barometer (brass scale) also at 21.1(°C) reads 74.19 (cm) of mercury . What is the absolute pres...
【简答题】简述接触器和继电器的区别
【单选题】In Fig. FE2.3, if the oil in region B has SG=0.8 and the absolute pressure at point A is 1 atm, what is the absolute pressure at point B?
A.
5.6kPa
B.
10.9kPa
C.
107kPa
D.
112kPa
E.
157kPa
【单选题】The gauge pressure inside a container is -0.5kg/cm2, then what is the absolute pressure exerted to the inside surface of this container?
A.
0.05Mpa.
B.
0.95 Mpa.
C.
05 Mpa.
D.
0.5 Mpa.
【单选题】In Fig. FE2.3, if the oil in region B has SG=0.8 and the absolute pressure at point B is 96.5kPa, what is the absolute pressure at point A?
A.
11kPa
B.
41kPa
C.
86kPa
D.
91kPa
E.
10141kPa
【单选题】What is the absolute phrase in this sentence? Her kids tucked into bed, Jane could finally go to sleep.
A.
Her kids tucked into bed
B.
go to sleep
C.
Jane could finally go to sleep
D.
tucked into bed
【简答题】接触器和继电器的区别?
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