- 闭合电路的欧姆定律
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I suppose that they do not have a clear idea who ______ the story.
A．originated
B．generated
C．manufactured
D．estimated
正确答案
A
解析
暂无解析
Whenever I am in trouble, he is sure to help me out. I've ______
A．never met a kind man
B．ever met a kind man
C．ever met the kindest man
D．never met a kinder man
正确答案
D
解析
这句话在意思上等于：“He is the kindest man I've ever met．” (他是我所遇见过的最好的人。)这句话体现了比较级和最高级之间相互转换的关系。再如：I've never seen a better film than this one．可转换为：This is the best film I've ever seen．其他几个选项意思上都不对。
"Did you go to Belgium last year when you were on a business trip to Europe " "No, ______ there"
A．I have never gone
B．I never did
C．I've never been
D．I never was
正确答案
C
解析
暂无解析
If you ask for my opinion, I'd rather that you ______ for America next week.
A．will leave
B．left
C．would leave
D．has left
正确答案
B
解析
本句是一个had rather引出的虚拟宾语从句，其后的从句谓语动词必须用虚拟语气，形式是时态提前，即对现在动作的虚拟用一般过去时，对过去动作的虚拟用过去完成时，但是对将来动作的虚拟则通常用一般过去时。此句的意思是“我宁愿你下周动身去美国”，表示的是对将来的假设，因而应选 B。
I ______ that John will come to the party. He's busy preparing for an examination.
A．suspect
B．doubt
C．expect
D．think
正确答案
B
解析
句子的上下文表明，John来参加晚会的可能性不大，因而所要填的动词应表达否定的意思，所以C和D可以首先排除。至于A和B，这是中国学生经常混淆的一对词。二者在汉语中都可译为“怀疑”，但其意思却差别很大。doubt表示对某事的真实性或可能性有疑问，因而具有否定的意味，而suspect表示认为某事是可能的，因而具有肯定的意味。
用贷款购买设备，企业可将所支付的利息及折旧从成本中扣除而免税，并且可以回收( )。
A．净值
B．残值
C．净现值
D．剩余价值
正确答案
B
解析
暂无解析
______ is often the case, the girl forgot to bring her dictionary.
A．As
B．Such
C．That
D．It
正确答案
A
解析
本句中as为关系代词，引导一个从句，并在从句中作主语，而在意思上则代表主句所表达的整个概念(因此，as后的谓语要用单数)；“这个女孩忘带字典了”。as也可在从句中作宾语，例如As you will find out，a11 is now settled。
The coach didn't just want to win the match, but wanted his team to ______ their opponents by at least three to nil.
A．win
B．strike
C．repel
D．overwhelm
正确答案
D
解析
暂无解析
Cats sleep ______ day and hunt ______ night.
A．in, in
B．at, at
C．during, during
D．by, by
正确答案
D
解析
暂无解析
China is one of the few countries in the world that have devoted great efforts to ______ world peace.
A．preserving
B．conserving
C．possessing
D．reserving
正确答案
A
解析
暂无解析
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