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【简答题】
有如下: float pi; pi = 3.1415926; printf("%3.0f", pi); 其输出结果是( )。 (注:□代表一个空格符) A. □□3 B. □3. C. 3□□ D. 3.□
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皮皮学刷刷变学霸
举一反三
【简答题】复印机 n. __________
【单选题】In the story told by Dave Barber, ______.
A.
he was finally saved by his grandmother
B.
he was finally saved by his nine-year-old son
C.
he would have been drowned if his grandmother had not lifted him
D.
he would have been taken away by his grandmother if his son had not dragged him down
【单选题】下列有关基因的叙述，错误的是 [ ]
A.
原核生物的基因和真核生物的基因化学本质不同，结构不同
B.
病毒可在基因工程中作运载体
C.
利用基因工程可生产胰岛素
D.
基因工程中用人工合成法获得的真核生物的目的基因无内含子
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