我国粮食、蔬菜、肉、蛋、鱼、奶中污染水平升高较快,3年全国平均值超过国家平均标准2倍的重金属是
A.锰B.镉C.铅D.铝E.镁
参考答案:C
句型转换。
1. Jim will watch the ballet tomorrow evening. (改为一般疑问句 )
Jim the ballet tomorrow evening?
2. We clean our classroom every day. (用 tomorrow改写句子 )
We classroom tomorrow.
3. The good girl always looks after the old woman. (改为同义句)
The good girl always the old woman.
4. They will do some shopping this Sunday. (对画线部分提问 )
they this Sunday?
5. there , three ,be , will , films , next , interesting , month (连词成句)
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剪力分配法适用于计算等高排架的内力。