新生儿非特异性免疫功能表现为()
A.WBC吞噬作用差
B.皮肤黏膜薄嫩
C.血清补体含量低
D.缺乏分泌型IgA
E.血清补体含量高
参考答案:A, B, C
—Where is Mr. Yu,do you know?
—Well,it's hard to say. But I heard him _____ loudly here just now. [ ]
A. was reading
B. reading
C. had read
D. to read
1973年加入欧共体的国家有()
A.英国
B.葡萄牙
C.挪威
D.爱尔兰
E.丹麦