断条器导向挡块与滤条之间的距离是()mm,距离过大起不了限制滤条跳动的作用,压了太紧,滤条会出现皱折。
A、0.2
B、0.5
C.0.8
D.0.1
参考答案:B
The doctor is trying to save the patient by every means _______ .
A.imaginative
B.imaginable
C.imaginary
D.imagination
与组成蛋白质的20种氨基酸相应的密码子有:()。
A.4个
B.20个
C.61个
D.64个