两种元素原子的核外电子层数之比与最外层电子数之比相等,则在周期表的前10号元素中

题型:选择题

问题:

两种元素原子的核外电子层数之比与最外层电子数之比相等,则在周期表的前10号元素中,满足上述关系的元素共有[ ]

A.1对

B.2对

C.3对

D.4对

考点:原子核外电子的排布
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A: Hello, Jim 小题1:  

B: Oh, yes, I like it very much.

A: Well. 小题2:   

B: Twice a week.

A: Who do you play basketball with?

B: I play it with my friends.

A:  小题3:  

B: For about an hour.

A:  小题4:  

B: On Tuesday and Friday afternoon.

A: Do you like watching basketball match?

B: Yes, very much.

A: Tomorrow is Sunday. Would you like to go and watch a basketball match with me?

B:  小题5: but I have to do my homework on Sunday.

A.Yes, I would

B.How often do you play basketball?

C.Yes, I’d like to.

D.How long do you play basketball every time?E.Do you like playing basketball?

F.No,I wouldn’t.

G.When do you usually play basketball?

题型:选择题

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A.公平公正原则

B.优先原则

C.效率、效益原则

D.价值原则

E.不伤害原则

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A、不能,须人工打印

B、可以,,当该功能已设置,飞机落地后打印

C、可以,,当该功能已设置,发动机关车后打印

D、不确定

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