不是所有细菌生长所必需的营养物质是()
A.水分
B.碳源
C.X生长因子
D.氮源
E.无机盐
参考答案:C
解析:某些营养要求较高的细菌需要生长因子。
The boy is not particular about food and always eats ________ his parents give him.[ ]
A. no matter what
B. whichever
C. no matter which
D. whatever
细菌常以杆状、螺旋状等多种形态出现()