巨细胞病毒感染对新生儿的危险表现为()
A.低出生体重
B.黄疸、肝脾大,紫癜
C.视网膜脉络膜炎
D.智力障碍
E.脑内钙化,小头症
参考答案:A, B, C, D, E
This text is ________easier and ___________interesting than that one.
A.more; much
B.much; more
C.more, more
D.much; much
按循环方式分类,热注锅炉属于()锅炉。
A.自然循环
B.部分自然循环
C.强制循环
D.部分强制循环