A:highly, highly
B:high, high
C:high, highly
D:highly, high
下列细胞中,肯定含有Y染色体的是( )
在利用光具座进行凸透镜成像的实验探究中:
—I know nothing about it.
已知全集U={x|0<x<9},A={x|1<x<a},若非空集合A⊆U,则实数a的取值范围是( )
① climb____② eat ____③ play____④ jump____⑤ run____⑥ drink____