在细胞分裂过程中，平均分配到两个子细胞中的是（）
A.染色体
B.液泡
C.细胞膜
D.细胞核
参考答案：A
The teacher asked us to stop and him carefully.[ ]
A. reading; listening to
B. reading; to listen to
C. to read; to listen to
D. to read; listening to
X线管的真空度应保持在
A．133.3×10-5Pa
B．133.3×10-6Pa
C．133.3×10-3Pa
D．133.3×10-4Pa
E．133.3×10-2Pa
