自动照相机能够根据光的强弱自动调整曝光量,所用的感光元件就是一个用半导体材料制成

题型:选择题

问题:

 自动照相机能够根据光的强弱自动调整曝光量,所用的感光元件就是一个用半导体材料制成的光敏电阻.影响光敏电阻导电性能的主要因素是(  )

A.温度

B.光照

C.电压

D.压力

考点:滑动变阻器
题型:选择题

阅读理解。

     Father came to Jack's bed and sat down beside him.

     "How was your day?" asked Father.

     "It wasn't a very good day for me," Jack answered. I had a fight with Tom. The teacher sent a note

home about me. And I talked back to Mother."

     "Yes, part of the day was bad," his father said.  "But tell me about the best thing that happened today."

     Jack thought for a minute, then smiled. "After school I went fishing alone," he said."I didn't think I

could have any luck. But I did. I caught a fish!"

     "I'm glad you had a good time," Jack's father said. "Think about it until you go to sleep.  Now I'm

going to turn off the light. Have happy dreams."

     Every night, Jack answers the same question. "What was the best thing that hapened to you today?"

Every night, Jack thinks about the best part of his day. This gives him many happy dreams.

     Sometimes he has to think hard to find the best thing. Sometimes it is a very small thing. But he always

finds one good thing to think about. Jack's father taught him to end his days in a wonderful way.

1. Jack had a __ _____ with Tom.

2. Jack's father asked Jack to tell him _____      that happened today.

3. Jack went fishing alone and __       __ .It's so lucky.

4. Every night Jack answers the same question"_        ___".

5. If you think about the best part of the day, this gives you ________.

题型:选择题

对于理想气体系统来说,在下列过程中,哪个过程系统所吸收的热量、内能的增量和对外做的功三者均为负值?()

A.等容降压过程

B.等温膨胀过程

C.绝热膨胀过程

D.等压压缩过程

题型:选择题

男患,68岁。3年前出现手指发抖,动作迟缓变少,小步走路且不稳。查体:血压l30/90mmHg,心肺理诊未见异常。面具脸,慌张步态,步态不稳,指端震颤,肌张力增高,左侧肢体肌张力呈齿轮样增高,头颅MRI未显示异常,实验室检查未见异常。该患者的诊断为()

A.亨廷顿病

B.帕金森病

C.脑动脉硬化

D.肝豆状核变性

E.脑梗死

题型:选择题

()是前厅的首要任务。

A.销售客房商品

B.调度饭店业务

C.协调对客服务

D.提供前厅系列服务

题型:选择题

下面对古代文化常识解说有误的一项是:

A.“熙宁”是北宋神宗皇帝的年号;“乾隆”则是清代康熙皇帝的年号。

B.“贯”是穿连的意思,古人把一千个铜钿用绳子串起来,称为“一贯”。

C.《山海经》、《淮南子》和《搜神记》等都是记载了大量中国神话的古代著作。

D.“四六文”又称骈俪文,因其句式多以四、六句为主而得名。它大约产生于魏晋后,流行至清末。

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