反电枢可逆电路由于电枢回路(),适用于要求频繁启动而过渡过程时间短的生产机械,如可逆

题型:单项选择题

问题:

反电枢可逆电路由于电枢回路(),适用于要求频繁启动而过渡过程时间短的生产机械,如可逆轧钢机、龙门刨等。

A、电容小

B、电容大

C、电感小

D、电感大

考点:维修电工高级维修电工高级维修电工理论知识试卷(四)
题型:单项选择题

阅读短文,选择正确答案。

      On National Day, we had a long holiday. We had seven days. I went to Hainan with my parents. My

grandparents lived in a beautiful village in Hainan. We visited them. We went to see the blue sea every day.

We swam in it. We went fishing. My grandma cooked good food for us every day. The seafood is tasty. I

like it. We took many pictures. I was excited.

1. I went to Hainan with my ______________.

A. father and mother

B. grandparents

C. parent

2. There are ______________ days on National Day.

A. a week

B. seven

C. five

3. I was ______________ on National Day.

A. very happy

B. tired

C. bored

4. I can ______________ in Hainan.

A. went fishing

B. swim and go fishing

C. went swimming

5. We ate good food ______________.

A. last weekend

B. every day

C. on National Day

题型:单项选择题

以下有关覆盖义齿基托的描述,错误的是()

A.尽可能少覆盖龈边缘

B.无牙区基托设计与传统总义齿相近

C.可设计暴露牙周的基托

D.根帽和基托要作为一个形态和功能单位考虑

E.基托与基牙应紧密接触,使基牙能分散咬合力

题型:单项选择题

关于警察的本质,下列说法正确的是( )。

A.制度不同,警察的本质也不同

B.阶级基础不同,警察的本质也不同

C.管理体制不同,警察的本质也不同

D.世界各国警察的本质是共同的

题型:单项选择题

关于囊尾蚴病,下述错误的是()

A.囊尾蚴主要寄生在皮下组织、肌肉及中枢神经系统

B.牛带绦虫患者是囊尾蚴病的唯一传染源

C.可通过异体感染和自体感染途径传播

D.患者以青壮年男性多见

E.为我国北方主要的人畜共患病

题型:单项选择题

窦性心动过速的频率为()

A.>160/min

B.>80/min

C.>120/min

D.60~100/min

E.>100/min

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