使用燃气热水器,一般情况下胶管不要穿墙,长度不要超过2米,胶管要经常检查,如发现有裂

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问题:

使用燃气热水器,一般情况下胶管不要穿墙,长度不要超过2米,胶管要经常检查,如发现有裂痕、变硬、变软,应更换新的耐油胶管。

考点:常见灾害安全知识竞赛常见灾害安全知识竞赛题库
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关于慢性肾小球肾炎的描述错误的是()。

A.血尿

B.蛋白尿

C.肾功能不全

D.收缩压较高,可为持续性或波动性

E.病情发展缓慢,病程持续一年以上

题型:判断题

上下唇动脉位于唇部的层次为()

A.浅筋膜上

B.黏膜中层

C.黏膜下层

D.皮下

E.口轮匝肌内

题型:判断题

空气机械泡沫灭火剂是由()的空气、9.4%~9.7%的水分和0.3%~0.6%的发泡剂充分接触混合后生成的,能与火源空气隔绝使火焰熄灭。

A、90%

B、95%

C、96%

D、98%

题型:判断题

This is a famous street in China. What is it It’s West Street. Why is it so famous Now let me tell you something (41) it.
West Street is in Yangshuo, Guangxi. It’s over 1,400 years (42) .It’s about 1,000 meters (43) . But it’s very clean and beautiful. In the street, there are (44) shops. The things in the shops are nice and cheap. Every day, lots of visitors come here. Many of (45) are foreigners. It’s a good place to practice speaking English. So West Street is called the biggest English corner. Some people (46) call it the earth village. Almost everyone in the street (47) English.
But you mustn’t ride your bike or drive your car in the West Street. You can only (48) here. Why Because it’s a walking street. In the street, you needn’t worry that you’ll be hit by cars. (49) happy!
West Street is a wonderful place to visit. (50) West Street.

[A] black [B] long [C] old

题型:判断题

热电耦式电压表的优点是()。

A、灵敏度高

B、选择性好

C、一表多用

D、测任何波形读数均为有效值

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