抑癌基因失活的机制有()
A.等位基因的隐性作用
B.抑癌基因的显性负作用
C.单倍体不足假说
D.基因甲基化
E.杂合子缺失
参考答案:A, B, C, D, E
Many children in the kindergarten have been affected by the hand, foot and mouth illness; ______,the school
has to break up. [ ]
A. as a result
B. after all
C. any way
D. otherwise
在酒店内()属于厨房设备。
A、绞肉机、电冰箱、炉灶、锅、勺
B、搅拌机、炉灶、瓢、铲、电烤箱
C、电冰箱、绞肉机、搅拌机、锅、瓢
D、绞肉机、搅拌机、电冰箱、炉灶、电烤箱