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【单选题】
2011年3月11日，日本大地震导致核电站放射性物质向外释放。放射性物质可通过呼吸、皮肤伤口及消化道进入人体内，引起内辐射，放射线也可穿透一定距离被机体吸收，使人员受到外辐射伤害。受放射性物质辐射后人体可能出现的情况是 [ ]A.
人体致癌、致畸风险加大
B.
人体大部分细胞中染色体数目加倍
C.
I 131 一旦被人体吸入，最可能会引发呆小症
D.
人体肌肉细胞比红骨髓中的干细胞更容易发生突变
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举一反三
【简答题】Mr. Smith ____(write) a book about China last year. 答案是:wrote
【单选题】Mr. Smith required that each of his students a composition every week.
A.
writing
B.
to write
C.
write
D.
wrote
【简答题】Mr.Smith works in an office. He’s very busy 小题1: .Every evening, when he comes back from his office, he’s always tired and wants to go to bed early. 小题2: .She doesn’t stop talking until she falls asle...
【简答题】简述中西建筑艺术总体特征的差异。
【单选题】Mr. Smith ___a book about China last year but I don't know whether he has finished it.
A.
has written
B.
wrote
C.
had written
D.
was writing
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