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【判断题】
计算流体力学是用非线性方程组离散的办法求解的。
A.
正确
B.
错误
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【判断题】孔式喷油器的喷孔直径一般要比轴针式喷油器的喷孔大。 ( )
A.
正确
B.
错误
【单选题】如果气缸套镗刀耐磨性差,将造成气缸表面( )。
A.
下大上小的锥度
B.
上下小而中间大的鼓度
C.
上大下小的锥度
D.
形成椭圆
【单选题】Unless we can find a way to _____ nature and then invest in protecting it, our basic life-support systems are going to collapse.
A.
 ascend
B.
hug
C.
escort
D.
appraise
【单选题】Unless we find a way to ________ nature and then invest in protecting it, our basic life-support systems are going to collapse.
A.
applause
B.
praise
C.
appraise
D.
raise
【单选题】Unless we can find a way to nature and then invest in protecting it, our basic life-support systems are going to collapse.
A.
strap
B.
underlie
C.
appraise
D.
escort
【单选题】6 Unless we can find a way to ______ nature and then invest in protecting it, our basic life-support systems are going to collapse.
A.
appoint
B.
applaud
C.
appraise
D.
appall
【简答题】Unless we can find a way to a_______ nature and then invest in protecting it, our basic life-support systems are going to collapse.
【单选题】Unless we can find a way to ________ nature and then invest in protecting it, our basic life-support systems are going to collapse.
A.
appreciate
B.
appraise
C.
account
D.
approximate
【简答题】Unless we can find a way to ( ) nature and then invest in protecting it, our basic life-support systems are going to collapse.
【单选题】已知在一定温度下,氨水的Kb=1.8×10-5,其浓度为0.500mol/L时溶液的pH为( )。
A.
2.52
B.
11.48
C.
9.23
D.
12.47
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