以下各种用电器中,主要利用电流热效应工作的是( ) A.电视机 B.电冰箱 C

题型:选择题

问题:

以下各种用电器中,主要利用电流热效应工作的是(   )

A.电视机

B.电冰箱

C.电风扇

D.电热水壶

考点:电流的热效应、化学效应
题型:选择题

先阅读短文,在其后空白处写出各单词的正确形式,单词的第一个字母已给出。

One day Harvey’s wife was cleaning out a cupboard.

“Look at all these umbrellas,” Harvey’s wife said to him. “There are eight and they all b__小题1:___.”

“I’ll take them all to the umbrella shop and have them repaired,” Harvey said. “They are too good to t__小题2:away.”

Harvey took the eight umbrellas to the shop and l_小题3:_ them there. The shopkeeper said, “They’ll be r__小题4:_ tomorrow.”

That evening Harvey went home from the office by bus as he u_小题5:__ did. He sat next to an old woman. She had an umbrella on the floor between the s__小题6:__. When the bus reached his stop, he picked up her umbrella and stood up.

“Hey!” the woman said, “That umbrella b__小题7:__ to me.”

“I’m so sorry.” Harvey said, giving it to her. “Please excuse me for taking your umbrella by m__小题8:_.”

The next day he collected the umbrellas from the umbrella shop and got on the bus. As he sat down, a v__小题9: behind said, “You have certainly had a s_小题10:__ day!” He turned around and saw the woman whose umbrella he had almost taken the day before.

题型:选择题

过敏性紫癜的典型皮损为()

A.散在瘀点,稍隆起于皮面

B.全身散在红色风团

C.躯干、四肢靶形红斑

D.簇状排列的针尖至粟粒大小水疱,呈带状分布

题型:选择题

当SF6断路器(配液压机构)发出以下()信号时,断路器不可以切断负荷电流。

A.气体压力低闭锁

B.油压重合闸闭锁

C.气体压力低报警

D.油压过低油泵起动

题型:选择题

MISUN(P)板提供()路AI,()路DI和()路DO(其中1路DO用于控制USB摄像头)。

A.8;4;4

B.16;8;8

C.16;10;4

D.16;14;6

题型:选择题

电气化铁道用避雷器的线路放电等级为()

A.1级

B.2级

C.3级

D.4级

更多题库