某厂一台300MW机组，一直全出力运行状态。4月29日12：00因节日检修开始停运，5月3日1：00启动并网。4月份机组计划检修系数是（）。

A、11.81%

B、0

C、0.5%

D、5%

单句改错。

1. my name is betty and i'm from america.

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2. these are my friends.

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3. she can't play basketball.

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4. She is american and she's a secretary in china.

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5. these american teachers can speak chinese.

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