皮皮学,免费搜题
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搜题
【单选题】
食用发霉甘蔗最可能导致
A.
致病性真菌感染
B.
条件致病性真菌感染
C.
真菌性中毒
D.
真菌毒素致癌
E.
真菌性反应
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举一反三
【单选题】三视图是指哪三个视图 ?
A.
主视图、俯视图、左视图
B.
主视图、俯视图、右视图
C.
前视图、俯视图、左视图
D.
主视图、仰视图、左视图
【单选题】The speed of a radial piston hydraulic motor is controlled by varying the ___
A.
amount of cylinder block offset with respect to the rotor
B.
fluid flow rate discharged to the motor
C.
length of the motor piston stroke on the power cycle
D.
pintle discharge rate to the suction side of the pump
【简答题】The radial piston pump adjusts its displacement by changing the during working.
【单选题】If a radial piston hydraulic pump fails to deliver rated fluid volume, the cause can be _____.
A.
contaminated fluid
B.
pitted thrust rings
C.
worn pintle bearings
D.
obstructed suctions passage
【单选题】电路如图所示,则提供功率的电源是( )。
A.
电压源
B.
电流源
C.
电压源和电流源
【简答题】会计法律制度是会计职业的最低要求,会计职业道德是对会计法律制度的重要补充。( )
【单选题】An axial轴向 piston pump differs from a radial piston pump as the pistons of an axial piston pump are positioned ().
A.
radially from the shaft
B.
parallel to each other and to the shaft
C.
parallel to each other but at a right angle to the shaft
D.
at an angle to each other and to the shaft
【单选题】在丝锥攻入1~2圈后,应及时从()方向用90°角尺进行检查,并不断校正至要求。
A.
前后
B.
左右
C.
前后、左右
【单选题】电路如图所示,则提供功率的电源是 ( )。
A.
电压源
B.
电流源
C.
电压源和电流源
D.
-10
【单选题】With reference to a radial piston pump, which one of the following statements is false?
A.
Surrounding the fixed shaft is a hollow shaft
B.
This hollow shaft carries radial bores
C.
Each bore is fitted with a well-lapped plunger
D.
There are always even numbers of bores
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