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【单选题】
产生应变片温度误差的主要原因有A.
电阻丝有温度系数
B.
试件与电阻丝的线膨胀系数相同
C.
电阻丝承受应力方向不同
D.
电阻丝与试件材料不同
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举一反三
【单选题】If the production possibilities curve is a straight line:
A.
opportunity costs increase as output of either commodity is expanded.
B.
resources are not equally substitutable between the production of the goods.
C.
opportunity costs are negative.
D.
as an increasing quantity of resources are shifted from one manufacturing process (good Y) to another (good X), there is no increase in opportunity cost.
【单选题】—Is there a market in the neighborhood? —_____.Just go straight and turn right. [ ]
A.
Yes, there is
B.
No. there isn 't
C.
Yes, it is
D.
No, it isn 't
【简答题】试从电极头温度、弧焰温度、稳定性及主要用途比较三种常用光源(直流、交流电弧,高压火花)的性能。 光源 电极头温度 弧焰温度 稳定性 主要用途 直流电弧 交流电弧 高压火花
【简答题】A．祛风湿，补肝肾，强筋骨，安胎 B．祛风湿，强筋骨，利水消肿 C．补肝肾，强筋骨，安胎 D．补肝肾，行血脉，续筋骨，安胎止漏 E．补肝肾，强筋骨，祛风湿 杜仲的功效是( )
【单选题】杜仲的功效是( )
A.
补肝肾，强筋骨，安胎
B.
补益肝肾，强筋健骨，止血安胎，疗伤续折
C.
补肝肾，强腰膝，祛风湿
D.
活血续伤，补肾强骨
E.
滋阴补肾，凉血止血
【简答题】Directions: 1.Read the conversation and fill in the blanks with the information below 2. Listen to the tape and check your answer. here’s your key is that correct enjoy your stay may I help you we hav...
【简答题】A．祛风湿，补肝肾，强筋骨，安胎 B．祛风湿，强筋骨，利水消肿 C．补肝肾，强筋骨，安胎 D．补肝肾，行血脉，续筋骨，安胎止漏 E．补肝肾，强筋骨，祛风湿 杜仲的功效 A． B． C． D． E．
【单选题】Kevin: Is the restaurant any good? Tommy: ______, but you have to try it for yourself.
A.
I think it' s great
B.
Don't worry about it
C.
It' s a joke
D.
I' ve never been there
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