“嫦娥二号”探月卫星的质量为m,当它的速度为v时,它的动能为( ) A.mv B

题型:选择题

问题:

“嫦娥二号”探月卫星的质量为m,当它的速度为v时,它的动能为(   )
A.mv

B.

C.mv2

D.

考点:动能
题型:选择题

女性,32岁。低热、胸闷、气促。查体:颈静脉怒张,心界向两侧明显扩大,坐位时呈三角形,仰卧位心底部浊音区增宽。此病人最可能的诊断是()

A.急性心肌梗死

B.缩窄性心包炎

C.扩张型心肌病

D.缺血性心肌病

E.结核性心包炎伴心包积液

题型:选择题

In order to have the arrangements ________ for the party, the organizers have spent three days preparing.

A.in charge

B.in sight

C.in case

D.in place

题型:选择题

下列属于信用创造工具的是( )。

A.货币互换交易

B.可转让大额定期存单

C.票据发行便利

D.可转债

题型:选择题

单词拼写。根据所给汉语或英语首字母写出短文中所缺英语单词的正确形式。

Jimmy is a middle school student. He adopted (收养) three homeless baby dogs two months ago. He took good c       of them and the dogs became healthier and fatter. Jimmy loved them very much. But now he feels worried. He has some problems. First, he has run out of his money to  b        food for dogs, because it is expensive. Second, the dogs are too big and there is not足够的       room for them. Third, the dogs have become too noisy. So his mother讨厌_______ them. She can’t stand them.

Some of Jimmy’s friends are trying to cheer him up. Some advise(建议) Jimmy should put up dogs’照片_______ in the street and look for their owners. Some suggest him calling the TV station for help. Do you have any goodi      to help him?

题型:选择题

ClSO3H称为氯磺酸,是一种强酸。对于反应:ClSO3H+HCOOH===CO+ HCl+ H2SO4有如下判断,其中合理的是      [ ]

A.此反应属于复分解反应     

B.此反应中碳元素的化合价发生改变     

C.反应后溶液的pH变大   

D.反应后溶液的pH减小

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