(G+C)mol%值
参考答案:
它表示DNA分子中鸟嘌呤和胞嘧啶所占的摩尔百分比值。
-Would you like to go to the Dongguan Street with me tomorrow? I'm free now!
- . [ ]
A. Never mind.
B. Sorry, it's very kind of you.
C. I'd love to, but I'm busy.
D. No, that's no problem.
下列环境问题属于按地理空间划分的是[ ]
A、大气污染问题
B、生态破坏问题
C、工业环境问题
D、全球环境问题