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
