决定基因表达空间特异性的因素是
A.个体差异
B.细胞分布
C.器官分布
D.生命周期
E.发育时间
参考答案:B
— The weekend is disappearing so fast! Let's look for some fun!
— _____. We really need some relaxation. [ ]
A. That's a good point
B. You can make it
C. Time is running out
D. It isn't my cup of tea
在LC正弦波振荡电路中,不用通用型集成运放作放大电路的原因是其上限截止频率太低。