搜题请搜索小程序“爱下问搜题”
问题 选择题

下列说法正确的是 (　 　)

A．若把H2S分子写成H3S分子，违背了共价键的饱和性

B．H3O＋离子的存在，说明共价键不应有饱和性

C．所有共价键都有方向性

D．两个原子轨道发生重叠后，两核间的电子仅存在于两核之间

答案

答案：A

H3O＋离子中含有配位键，没有共价键的饱和性，B不正确。氢原子的电子云是球形的，氢气中的共价键没有方向性，C不正确。两个原子轨道发生重叠后，两核间的电子并不仅存在于两核之间，而仍然是在围绕原子核运动，D不正确。所以正确的答案是A。

判断题

因军队与人民警察的建制不一样，人民警察因公致残的，与因公致残的现役军人享受国家不同的抚恤和优待。（）
查看答案
单项选择题

Just how does a person arrive at an idea of the kind of person that he is He develops this (1) of self through a gradual and complicated (2) which continues throughout life. The notion is an (3) that one establishes only with the help of others. (4) the elementary knowledge that one is short or tall is a comparative judgment that we cannot make (5) we have the opportunity to (6) ourselves with others. One’s idea of qualities which are harder to (7) is even more dependent upon other people’s ideas.

Whether one is intelligent, or stupid; attractive, or ugly; these and many other ideas of the self are (8) from the reactions of people with whom we (9) This process of (10) the nature of the self from the reaction of others has been labeled the "Looking-glass Self" by Cooley, who carefully analyzed this psychological (11) of self-discovery.

Just as the picture in the mirror gives an image of the physical self, (12) the perception of the reactions of others gives an image of the social self. We know, (13) , that we are good at certain things and not at others. This (14) came to us from the reactions of other persons, first our parents and then other individuals (15) in life. It should be remembered that, as other people’s reactions could be (16) and understood in more than one way, the looking-glass self with which the individual (17) may easily differ from the image others have actually formed of his (18) Clearly, it is our perception of the responses of others and not their (19) responses that (20) our self-image, and these perceptions are often not accurate.

17（）

A.senses

B.means

C.refers

D.states
查看答案