阀体破裂的原因不包括()。A.材质不好,内部有砂眼、气孔 B.阀门因碰撞产生了细小裂

题型:单项选择题

问题:

阀体破裂的原因不包括()。

A.材质不好,内部有砂眼、气孔

B.阀门因碰撞产生了细小裂纹,继续使用后裂纹扩展

C.阀体内存水结冰

D.阀芯与阀座的结合面被腐蚀、磨损

考点:锅炉操作工考试锅炉操作工考试题库
题型:单项选择题

请用所给单词的适当形式填空:(共15个,每个1分,共15分)

1. Look at the pictures and read what they have achieved even though they each have a __________(disable).

2. Nobody is said to have finished till there is no more _______________(leave) to buy.

3. He was sent by God, to minister to a soul too _______________(comfort) with himself.

4. Claire was so ________________(alarm) the first time she saw the robot, Tony.

5. This book was ____________(loose) based on the fall of Roman Empire but was about future.

6. My Brother was so ________(ambition) that he wanted to run for the president of this country.

7. I had to keep the video camera readily___________(access) in case I saw something that needed to be filmed.

8. No other creature cries _____________(emotion) tears the way we humans do.

9. The ability to pass on knowledge and command respect is the essential _______(qualify) for teachers.

10. The day we were looking forwards to __________________(come) at last.

11. The damage can be reduced by adopting higher quake-resistant standards for buildings and improving people’s _____________(aware) of disaster prevention and rescue.

12. ____________(compare) with your room , mine is too small.

13. There is a special chapter ____________(devote) to her cooperation with a famous physicist.

14. Many students complain that they have been _____(occupy) with their homework every day.

15. Don’t let your __________(imagine ) in full play when you are sitting in class.

题型:单项选择题

孕29周,昨晚突然 * * 出血100ml,今晨血止,开始有不规则宫缩,急诊入院,胎心120次/分,下列哪项处理最为合适()

A.肥皂水灌肠刺激宫缩

B.检查宫口开大情况

C.剖宫产

D.配血备用,严密观察

E.破膜引产

题型:单项选择题

在坡口符号标注中,“V”表示()。

A、单边V形坡口

B、V形坡口

C、带钝边V形坡口

D、带钝边单边V形坡口

题型:单项选择题

蒋先生的女儿目前刚读初中。但考虑到高等教育费用较高,他们一家想现在就开始为儿子准备大学及出国留学的费用。为了及早准备教育费用,蒋先生向理财规划师咨询相关问题。

根据资料回答下列问题。

蒋先生向理财规划师询问教育储蓄的相关问题,得知教育储蓄每月最低起存额为()。

A.50元

B.100元

C.200元

D.500元

题型:单项选择题

某化学兴趣小组在课外活动中,对某溶液进行了三次检验,每次检验结果如下表所示,请回答下列问题.

检验次数溶液中检验出的物质
第一次KCl、K2SO4、Na2CO3、NH4Cl
第二次NH4Cl、BaCl2、Na2SO4、K2CO3
第三次Na2SO4、NH4Cl、K2CO3、NaCl
(1)三次检验结果中第______次检验结果不正确.

(2)检验时,为了证明溶液中存在SO42-、Cl-、CO32-,进行下列实验:(填写下列空白)

步骤实验操作预期现象及结论
1向溶液中滴加______(填化学式)溶液至过量______
2____________
3过滤,再向滤液中加入______(填化学式)溶液______
(3)步骤1中溶液滴加过量的目的是______;如何判断步骤2中的溶液已加过量______.

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