系统频率变化的主要原因是()。A、负荷变化B、发生短路C、机械功率与电磁功率不平衡D

题型:单项选择题

问题:

系统频率变化的主要原因是()。

A、负荷变化

B、发生短路

C、机械功率与电磁功率不平衡

D、供电负荷大于用电负荷

考点:综采维修电工综采维修电工(综合练习)综采维修电工(综合练习)题库
题型:单项选择题

阅读理解.

     My name is Bill. I have a friend called Mike. Today is Mike’s birthday. I’m at his birthday party. There are a lot of friends in his house. Some stand beside the table and enjoy the snacks and drinks. There is

some food on the table. I like the chocolate and the fruit very much. Mike sits on the sofa and chats with

some friends there. He wears a yellow T-shirt and a pair of blue jeans. He looks so cool today. Wow! The cake is really big. There are some candles (蜡烛) on it. Mike’s friends begin to sing ‘Happy Birthday’ to Mike. Mike is very happy. He blows out (吹灭) the candles and cuts the cake. Everyone has a good time at the party.

1. There are a lot of friends at ________ birthday party.

A. Mike’s

B. Bill’s

C. my

D. Mike’s friend’s

2. What does Mike wear at his birthday party?

A. a blue T-shirt

B. a red T-shirt

C. a yellow T-shirt and a pair of blue jeans

D. a pair of red jeans

3. Which sentence is true?

A. Mike stands beside the table.

B. Mike likes the chocolate and the fruit very much.

C. Everyone has a good time at the party.

D. Mike’s friend has some candles.

4. What’s on the cake?

A. the chocolate

B. some drinks

C. the fruit

D. some candles

5. How does Mike feel today?

A. polite

B. sad

C. happy

D. helpful

题型:单项选择题

兼有止血作用的辛温解表药是()

A.荆芥

B.防风

C.白芷

D.升麻

E.蝉蜕

题型:单项选择题

由苍术、厚朴、陈皮、甘草、生姜和大枣组成的方剂是()

A.二陈汤

B.平胃散

C.厚朴温中汤

D.半夏厚朴汤

E.以上都不是

题型:单项选择题

表外业务与其他中间业务的最大区别在于( )不同。

A.收入的来源

B.承担的风险

C.经营目的

D.财务的处理

题型:单项选择题

与烤瓷冠桥不透明层有气泡无关的因素是

A.烤瓷合金多次重复使用

B.基底冠表面多方向打磨

C.使用不正确的金刚砂车针打磨基底冠

D.铸道按插不正确

E.遮色瓷层过薄

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