Not until all the fish died in the river how serious the pollution was .
A. did the villagers realize
B. the villagers realized
C. the villagers did realized
D. didn't the villagers realized
查看答案
运动应激综合征多发生于训练水平低、经验较少的新手身上。
A. 对
B. 错
某课题组拟检索上海第二医科大学附属瑞金医院陈竺教授发表的有关三氧化二砷治疗早幼粒白血病的研究文献,下列表达式中最佳的是
A. 上海第二医科大学附属瑞金医院 AND 陈竺教授 AND 三氧化二砷 AND 治疗 AND 早幼粒白血病 AND 研究文献
B. 上海第二医科大学附属瑞金医院 AND 陈竺 AND 三氧化二砷 AND 早幼粒白血病
C. 上海第二医科大学附属瑞金医院 AND 陈竺 AND 三氧化二砷 AND 治疗 AND 早幼粒白血病
D. 瑞金医院 AND 陈竺 AND 三氧化二砷 AND 治疗 AND 早幼粒白血病
so busy ,she would come to help you.
A. Were my daughter not
B. If my daughter isn't
C. Should my daughter not
D. Is my daughter not
They arrived at the farm house,in front of which .
A. is sitting a boy
B. sat a boy
C. a boy sat
D. a boy is sitting
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