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【单选题】
下列哪组病毒主要经呼吸道传播A.
流感病毒、呼吸道合胞病毒、柯萨奇病毒
B.
流感病毒、麻疹病毒、脊髓灰质炎病毒
C.
风疹病毒、鼻病毒、流感病毒
D.
呼吸道合胞病毒、流感病毒、甲肝病毒
E.
腮腺炎病毒、乙肝病毒、流感病毒
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【简答题】--- 现在完成时、过去完成时和一般过去时 基本概念 1.The old man_____ two days after he had been sent to hospital. A. died B. would die C. had died D. has died 2.Old McDonald gave up smoking for a while, but soon t...
【简答题】...had become the enemy. To him, ______________ "them," as opposed to "us. (4-6 words) 2. ..No. Instead, he ______________ an unwanted label. (4-6 words) 3. ...as opposed to "us. The label ___________...
【简答题】寒假作业 4 1. Jane's grandmother had wanted to write children’s book for many years, but one thing or another always got in way. A. a; 不填 B. the; the C. 不填 ; the D. a; the 2. Brian i...
【单选题】根据农产品质量安全法的规定，县级以上政府应当加强农产品基地建设，改善农产品生产条件。禁止违反法律、法规的规定向农产品产地排放或者倾倒废水、废气、（）或者其他有毒有害物质。
A.
固体废物；
B.
猪粪；
C.
鸡粪；
D.
塑料袋垃圾
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