企业管理文明化

阅读短文，判断下面的句子是否与短文一致，一致的在括号内打“√”，不一致的在括号内打“×”。

      Wu Dong has a good friend. His name is Peter. He is from Australia. Wu Dong and Peter are in the same

class. They go to school five days a week. They stay (呆) at home on Sunday and Saturday. Peter likes China

and Chinese food. He likes rice and cakes very much. At school, they play table tennis after class.

      Wu Dong and Peter like making things. Now they are mak ing a plane. They like flying planes on Sunday

morning. Peter can speak English and a little Chinese. Wu Dong can speak Chinese and a little English. They

teach each other (互相).

( ) 1. Wu Dong has an American friend.

( ) 2. They go to school from Monday to Friday.

( ) 3. They play table tennis on Sunday morning.

( ) 4. Peter likes rice and cakes very much.

( ) 5. Wu Dong can teach Peter Chinese.

如下供应商关系S和零件关系P。它们的主码分别是“供应商号”和“零件号”，而且，零件关系P的属性“颜色”只能取值为(红，白，蓝)。

供应商关系S：

零件关系P：

如果要删除关系S中的元组，可以被删除的元组（不考虑级联删除和空值删除）是（）。

A．(’100’，’红星’，’北京’)

B．(’200’,’宇宙’，’上海’)

C．(’300’，’黎明’，’天津’)

D．(’400’，’立新’，’重庆’)

有以下程序：intsub(intn){return(n/10+n%10);}main(){ intx,y; scanf("%d",&x); y=sub(sub(sub(x))); printf("%d\n",y);}若运行时输入 1234<回车>，程序的输出结果是_________。

儿童期出现的甲状腺结节恶性率为（）。

A．10％

B．30％

C．50％

D．70％

E．80％

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