正常情况下,大约有多少基底层细胞处于核分裂活动状态:
A. 5%
B. 10%
C. 20%
D. 30%
以下关于肥大细胞的描述错误的是:
A. 普遍存在于结缔组织中
B. 细胞表面有IgE受体
C. 被激活后可释放炎症介质
D. 所释放介质可导致微血管收缩
The chimney ( ) a cloud of smoke.
A. remitted
B. emitted
C. transmitted
D. intermitted
He had to work from morning till night, otherwise he would be ( ) by the boss.
A. disrupted
B. dispelled
C. dismissed
D. deducted