下列射线中,可以引起物质电离的电磁波有()
A.γ射线
B.β射线
C.紫外线
D.X射线
E.激光
参考答案:A, B, D
苯丙酮尿症临床表现最突出的特点是
A.尿有"鼠尿样"气味B.毛发黄褐色C.智力低下D.皮肤白皙E.抽搐发作
—How do you deal with their objections to our plan?
—I think we can safely ______them since our plan is made on a scientific basis.
A.approve
B.dismiss
C.distribute
D.disgust