The winter holiday is coming. Do you know ________ during the holiday?
A:what will Tim do
B:what did Tom do
C:what Tom will do
D:what Tom did
“做不了太阳,就做星星,以微弱的光亮点缀星空;做不了大树,就做小草,以点点葱绿装扮大地。”这首小诗主要告诉我们( )
组别
人数
百分比
145.5~149.5
1
2%
149.5~153.5
4
8%
153.5~157.5
m
40%
157.5~161.5
15
30%
161.5~165.5
8
n
165.5~169.5
2
4%
合计
50
100%
下列说法错误的是( )
下列举的各种细胞中,细胞核内基因成单存在的是( )