— It's a very popular game. I like it very much.
A:What do you like
B:How do you think
C:What do you think of
D:Do you like
甲每小时做7个零件,乙每小时做8个零件,做一个零件( )。
如图是光学显微镜的4个镜头,甲、乙的一端无螺纹,丙、丁的一端有螺纹.若要在视野内看到最多的细胞,宜选用的镜头组合是( )
下列植物的繁殖,不属于无性繁殖的是( )
若|x+y+1|与x-y-2 互为相反数,则(3x-y)3的值为( )