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【多选题】
在实行初级形式的国家资本主义阶段,企业的利润按国家所得税、( )四个方面进行分配,即当时所说的“四马分肥”。
A.
工人工资
B.
企业公积金
C.
工人福利费
D.
股金红利
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【简答题】若离心泵的实际安装高度大于允许安装高度,在操作中会发生()现象。
【简答题】在化学实验中,常常依据反应伴随的现象来确定反应是否发生.请按要求写出化学方程式. (1)反应中伴有发光、放热现象 ; (2)加热某种固体(或固体混合物),反应后固体质量减小 ; (3)根据下表写出有沉淀生成的复分解反应 . NO 3 ﹣ SO 4 2 ﹣ OH ﹣ K + 溶 溶 溶 Na + 溶 溶 溶 Cu 2+ 溶 溶 不溶
【简答题】下表列出由实验测定的几种物质的比热容. 根据以上表格,请写出两条你发现的规律. 规律一:______; 规律二:______.
【单选题】It can be inferred from the passage that in early America ______.
A.
people competed with each other fiercely for land
B.
many people worked for the railroad companies
C.
quite a few families made it on their own
D.
social and personal interdependence was indispensable to Americans
【简答题】填写单词。 1. His books have _______ the lives of millions of people. 2. How can I try to _______ English like a native speaker? You'd better practice more with English speaker. 3. It's our _______ to keep...
【简答题】请分别写出水分、灰分、挥发分、发热量和固定碳的项目符号?
【判断题】若离心泵的实际安装高度大于允许安装高度,在操作中会发生气蚀现象。
A.
正确
B.
错误
【单选题】若离心泵输送流体的温度增加,则其允许安装高度()。
A.
增大
B.
减小
C.
不变
D.
不确定
【单选题】The Lewis structure of AsH 3 shows __________ nonbonding electron pair(s) on As.
A.
0
B.
1
C.
2
D.
3
E.
This cannot be determined from the data given.
【单选题】The Lewis structure of N 2 H 2 shows __________.
A.
a nitrogen-nitrogen triple bond
B.
a nitrogen-nitrogen single bond
C.
each nitrogen has one non-binding electron pair
D.
each nitrogen has two non-binding electron pairs
E.
each hydrogen has one non-bonding electron pair
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