第29题: [单项选择]EV71病毒属于()。 A. 肠道病毒 B. 疱疹病毒 C. 黄热病毒 D. 细小病毒 E. 副黏病毒 参考答案:A
第30题: [单项选择]Lumber (production) was the (main industry) in Michigan until (the early) 1900's, (which) the automobile industry was established in Detroit. A. production B. main industry C. the early D. which 参考答案:D