可用被动免疫紧急预防
A.柯萨奇病毒B.埃可病毒C.脊髓灰质炎病毒D.肠道病毒72型E.肠道病毒70型
参考答案:C
风力发电机的风轮不必有防雷措施。()
The Greens _______ dinner in the kitchen now. [ ]
A. is having
B. having
C. are having