对建筑消防设施每年至少进行()次全面检测,确保完好有效,检测记录应当完整准确,存档备查。
A.1
B.2
C.3
D.5
参考答案:A
在△ABC中,∠C=90 °,AC=4,BC=3,则sinA=( ),cosA=( )
短文改错
I often quarrel about my mother over whether I can watch TV afterschool. She holds view
that senior three students have to make fully use of every minute to work hard at their lessons.
It seems to me that once I am allowed to do that, I'll unable to control myself and forget all about
my study. She also thinks it is bad for my eye. But I really can't accept her ideas. In my opinion,
watch TV can set my mind at rest after a day's hard works.Besides, it is important for us to know
what had happened at home and at abroad. Thus, we shouldn't be forbidden to watch TV.
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