A:1
B:2
C:3
D:4
下列各组物理量中,都是矢量的是( )
一只雌羊体细胞中有aabb两对基因,那么它的卵细胞中的基因组成是( )
使 3x-1有意义的x的取值范围是( )
⑴Lily is on the phone. ____ A.
⑵Jim can carry this bag.____ B.
⑶Be careful!The water is very hot.____ C.
⑷The apples are falling! ____ D.
⑸The plane is flying away.____ E.