DNA链中减少了-对碱基可导致（）
A．染色体畸变
B．移码突变
C．碱基转换
D．大段损伤
E．以上都不是
参考答案：B
If you want to be healthier, you have to eat ________ and take ________ exercise. [ ]
A. fewer, more
B. few, fewer
C. less, more
D. less, fewer
节奏
