﹣32+(﹣3)2的值是[ ] A.﹣12 B.0 C.﹣18 D.18

题型:选择题

问题:

﹣32+(﹣3)2的值是[ ]

A.﹣12

B.0

C.﹣18

D.18

考点:有理数的混合运算
题型:选择题

We have to ____ ourselves when we are away from home.

A.look at

B.look for

C.look up

D.look after

题型:选择题

文中共有10处语言错误,要求你在错误的地方增加、删除或修改某个单词。

增加:在缺词处加一个漏字符号(/\),在其下面写上该加的词。

删除:把多余的词用斜线(\)划掉。

修改:在错的词下划一横线,在该词下面写上修改后的词。

注意:1. 每处错误及其修改均仅限一词;

2. 只允许修改10处,多者(从11处起)不计分。

Like most of my schoolmates, I have neither brothers nor sisters—on other words, I am an only child. My parents love me dearly of course and will do all they can make sure that I get a good education. They did not want me to do any work at family; they want me to devote all my time on my studies so that I’ll get good marks in all my subject. We may be one family and live under a same roof, but we do not seem to get much time to talk about together. It looks as if my parents treat me as a visitor and a guest. Do they really understand their own daughter? What things are in other homes, I wonder.

题型:选择题

触发器是时序电路的基本单元,一般常用的有()。

A、RS触发器

B、JK触发器

C、D触发器

D、RS触发器、JK触发器和D触发器

题型:选择题

土壤的渗吸速度与哪几种因素有关?

题型:选择题

最早开辟了从欧洲通往印度新航线的航海家是()

A.哥伦布

B.达·伽马

C.迪亚士

D.麦哲伦

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