题目

Would you mind              here? There are so many children.               A. no smoking                B. not smoking          C. not to smoke 答案：B在结构方面无核膜包围的典型的细胞核，在代谢方面能把无机物合成有机物的一组生物是A.病毒和细菌B.硝化细菌和乳酸菌C.绿藻和蓝藻D.蓝藻和硝化细菌