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问题 选择题

化简（－a2）3的结果是．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．【   】

A．－a5

B．a5

C．－a6

D．a6

答案

Ｃ

负数奇数次方是负，指数相乘，所以选择C

名词解释

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填空题

Dear editor,
I am Evan from Canada. Being the eldest child in the family has its
disadvantages．First of all, I have to share all my______(玩具)with my 61.______
younger sisters．0f course，they don’t n______to return the favors because 62.______
I’m totally uninterested in their things．______(除……之外)that， 63.______
they are always hanging around me．I just can’t get a moment’p______． 64.______
At meals．I have to eat whatever is______the plate regardless of65.______
the taste．My sisters only try one bite if it not ______favorite food． 66.______
In addition，w______it comes to practicing our musical instruments，I have to67.______
Dractice than double the time．Worst of all，I get a larger quantity68.______
of homework，______(对比)to them．69.______
I’m feeling rather annoyed．Can you please g______me some advice 70.______
Yours truly，
Evan Smith
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