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可逆反应3H2＋N22NH3达到平衡的标志是( )。

①消耗3 mol H2的同时生成2 mol NH3

②1个N≡N键断裂的同时,有3个H－H键形成

③H2、N2与NH3的物质的量之比为3∶1∶2

④1个N≡N键断裂的同时,有6个N－H键断裂

⑤1个N≡N键断裂的同时,有6个N－H键形成

A．①②⑤

B．②④

C．①②③④

D．全部

答案

答案：B

①消耗3 mol H2的同时消耗2 mol NH3，②1个N≡N键断裂的同时,有3个H－H键形成④1个N≡N键断裂的同时,有6个N－H键断裂，平衡状态的标志。

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Part 4


Questions 26-45


·Read the following passage and choose the best word for each space.
·For questions 26-45, mark one letter A, B, C or D on the Answer Sheet.
During the past ten years (26) attention has been given to "telling it like it is". My impression is that this devotion to (27) one’s mind has more often led to hurt feelings and ruined relationships than (28) great joy.
I think we generally agree that never expressing real feelings and (29) all less-than-lovely thoughts about each other always leads to constructive communication. It’s a great (30) to allow ourselves to admit our human weaknesses and pursue more honest relationships with others. (31) we need to keep a balance between telling it all and telling nothing.
Recently I received a letter from a mother who had been (32) by her son to attend a weekend meeting with him. Under pressure from the group, her defenses cracked and she heard herself (33) her son for the first time that he (34) an accident—that she hadn’t been planning to have a child. He (35) told her that he couldn’t recall a single day in his childhood that he’d been happy. We cried and (36) ; I thought telling the truth had been good for us. But the trouble is, it wasn’t the whole truth. By the time Tommy was born I did want him, and at (37) he was happy. Ever since that day, we (38) . by some terrible feelings we exchanged. I must admit I’ve (39) the conclusion that some things are better left uncovered. Honesty is a fine policy, but we need a new sense of (40) . Disclosing is not a solution to every problem (41) even an end in itself. It’s useful under some circumstances and terribly hurtful under (42) . It’s a good idea, I think, to bite your (43) for ten or fifteen minutes before saying what’s (44) your mind. Try to decide whether it’s going to open up new and better ways of communication or (45) wounds that may never heal.

A．for

B．to

C．of

D．on
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判断题

税务机关依照有关法律、行政法规规定的职责和权限对纳税人的账簿、记账凭证、报表等会计资料实施的监督检查，属于会计工作的政府监督范畴。（）
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