液压系统发动机泵和电动泵的低压传感器及系统压力传感器:().A、发动机泵和电动泵的低

题型:单项选择题

问题:

液压系统发动机泵和电动泵的低压传感器及系统压力传感器:().

A、发动机泵和电动泵的低压传感器是同一个,系统压力传感器是另一个

B、发动机泵、电动泵的低压传感器和系统压力传感器都是同一个

C、发动机泵、电动泵的低压传感器和系统压力传感器都是各自独立的

D、以上都不对

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题型:单项选择题

根据短文内容,选择最佳答案。

Hello, everyone(每个人)! My name is Bob. I live in Toronto, Canada. It’s a very beautiful city. My parents are from France. They speak French. And I can speak English and French.

I am 13 years old and my birthday is in November. I’m a middle school student. There are thirteen girls and fifteen boys in my class. They are from five countries. They all come to learn English. There are eight Chinese students in my class and six of them are my good friends. I like China very much because it is a great country. I want to learn Chinese. And I want to go to China.

小题1:Where is Bob from?

A. France.    B. Canada.     C. China.

小题2:How many students are there in Bob’s class?

A. Thirteen.   B. Fifteen.        C. Twenty-eight.

小题3:What does Bob want to do?

A. He wants to go to China. B. He wants to learn English. C. He wants to go to France.

小题4:What languages can Bob speak?

A. English and Chinese.  B. English and French.  C. Chinese and English.

小题5:How many Chinese friends does Bob have?

A. Five.       B. Six.         C. Eight.

题型:单项选择题

一个长方形,周长64厘米,它是由3个完全相同的小正方形拼成的.那么每个小正方形的面积是______平方厘米.

题型:单项选择题

一根铜丝可围成一个面积为64π平方厘米的圆,若用它围成一个正方形,则其面 积是多少平方厘米( )

A.8π2

B.16π2

C.24π2

D.32π2

题型:单项选择题

下列关于终身寿险的叙述,正确的是______。
(1)终身寿险就是带有可续保条款的定期寿险
(2)当被保险人活到生命表的年龄上限,终身寿险保单的现金价值将与保额相等
(3)终身寿险的被保险人是保险合同保障的对象,投保人也可以为被保险人
(4)终身寿险保单没有现金价值

A.(1)(4)
B.(2)(3)
C.(1)(2)
D.(3)(4)

题型:单项选择题

厂用工作变压器的短路阻抗一般应()。

A.越小越好

B.越大越好

C.<10%

D.>10%

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