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【简答题】
请阅读下面对话,将适合的字词填入空格中: link wonder sensed clarify occur Failed Purchase M: The Online Store Customer Service Hotline. How may I help you? W: Hello, I just bought a product through your website, and I 1 _________ that there might have been a problem with my order because I never received a purchase confirmation. M: Let me 2 _________ that for you. May I have your name, please? W: Yes, it's Jane Caldwell. M: Is that C-A-L-D-W-E-L-L? W: That's correct. M: One moment please....... Ms. Caldwell, I don't see any purchase under your name. Did the problem 3 _________ when you keyed in your credit card information? W: No, that was OK. But, when I clicked the purchase button, my computer didn't 4 _________ to the final webpage, I 5 ________ whether it happened because I was using someone else's computer. M: Hmmm. . . that shouldn't be a problem. Let me check.
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【简答题】A) whatB) whetherC) whileD) if76. A) what B) whether C) while D) if
【简答题】A) likeB) asC) soD) too76. A) like B) as C) so D) too
【判断题】结晶温度越高,熔点越低。76. 结晶温度越高,熔点越低。
A.
正确
B.
错误
【单选题】以下( )不是广东储量丰富的矿产资源。
A.
煤炭
B.
高岭土
C.
泥炭土
【单选题】关于AVS描述正确的是?( )
A.
是奥迪气门升程系统的英文缩写
B.
既可以调节气门升程也可以调节气门正时
C.
气门升程是无极调节的
D.
只应用在进气凸轮轴上
【单选题】关于DSAl50/DSA200型单臂受电弓,()的叙述是错误的。
A.
静态接触压力为(70±5)N
B.
自动降弓时间为1.2S(到离网150mm)
C.
升弓时间小于5.4S
D.
降弓时间大于4S
【简答题】竖式计算: 708×92 436×53 470×43 326×76.
【单选题】定子电压下降到 0.5 倍额定电压,此时最大转矩为( )。
A.
0.5 T m ‍
B.
0.25 T m ‍
C.
T m ‍
【简答题】A) which B) where C) whatD) when76. A) which B) where C) what D) when
【单选题】定子电压下降到 0.5 倍额定电压,此时临界转差率为( )。
A.
0.5 S m ‍
B.
0.25 S m ‍
C.
S m ‍
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