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【单选题】
下列物质中,属于光化学氧化剂的是 ( ) 1 臭氧 2 PAN 3 醛类 4 过氧化氢A.
①和②
B.
②和③
C.
D.
都不是
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反馈参考答案：
举一反三
【简答题】Q23 What is the joint probability of A and B?
【单选题】—What did he say just now? —He wondered___________________.
A.
when he can join us
B.
that he could join us
C.
when could he join us
D.
whether he could join us or not
【单选题】What is the purpose of a semi-join?
A.
Increase the speed of the join for trade-off of increased data transmission cost.
B.
Increase the efficiency of sending data across multiple machines.
C.
Another name for join: an operation to combine two tables by column.
【单选题】下面关于肝性脑病用药护理错误的是
A.
服用新霉素不宜超过1个月
B.
使用谷氨酸钾或谷氨酸钠前，可先注射维生素C
C.
应用精氨酸时，滴速不宜过快
D.
应用乳果糖应从大剂量开始
E.
碱血症的病人，不宜应用谷氨酸钾或谷氨酸钠
【单选题】以下程序运行后的输出结果是( )。
A.
nclude
B.
in()
C.
t a=1,b=0; if(!a) b++; else b+=3; printf(“%d\n”,b); return 0;
D.
1
E.
2
F.
3
G.
4
【单选题】—What _____ do you want to join? —I want to join the music club. [ ]
A.
color
B.
time
C.
day
D.
club
【简答题】What does the club need to let you join it? They just need ______.
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