钒(V)被誉为金属中的“维生素”,其氧化物V2O5中钒元素的化合价是[ ] A.

题型:选择题

问题:

钒(V)被誉为金属中的“维生素”,其氧化物V2O5中钒元素的化合价是[ ]

A.+1

B.+3

C.+5

D.+7

考点:化合价的求法
题型:选择题

某同学散步时,测得心脏每分钟跳动70次,同时测得每走3步通过两米的距离.如果测得他散步的某段路程正好45步,脉搏跳动35次,则这段路程的长度是______m,他散步的平均速度是______m/s.

题型:选择题

设计合同示范文本规定,设计人负责设计的建(构)筑物需注明()。

A.施工方案

B.设计变更的期限

C.竣工验收的标准

D.合理使用年限

题型:选择题

我国《海船船员发证规则》规定,下列有关船员健康适任要求的说法中,不正确的是()。

A.一定时间内的平时工作小时最长每天不应超过12小时

B.工作小时可以必需的日常工作,如就餐替人或正常交接班所需的额外时间

C.各船应将值班安排表张贴在易见之处

D.应采取有效措施防止船员疲劳操作

题型:选择题

在那些产品差异性很小、而价格敏感度很高的资本密集且产品同质的行业中,竞争者之间通常是谋求( )局面。

A.攻击市场主导者

B.阵地防御

C.和平共处

D.迂回进攻

题型:选择题

A. You must have wronged me.
B. Oh! I’m so sorry about this.
C. Please stop just a second.
D. Are you Mr Smith
E. But may I ask you something first
F. Is there anything I can do for you
G. Now,sit down please.
A: Excuse me. (16)
B.Yes. You don’t know me,of course. I don’t teach here. I just give oral examinationshere now and then. Don’t be nervous.
A:Nervous Who Me
B: (17) I’m going to ask you a few questions. Then we are going to have a short con-versation in English. Do you understand
A:Yes,of course I do. (18)
B:After the examination,please. First of all,why are you learning English
A:Why am I learning English
B:Yes,I mean,what are you going to do with it Are you going to be a teacher of English, or what else
A: (19) I really must ask you something first.
B:Very well. If you insist,go ahead please!
A:Would you like a cup of coffee
B:Pardon What did you say
A:You see,I’m English. I’m one of the teachers here. I came to ask you if you would like a cup of coffee.
B: (20) .And thank you so much!

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