有如下程序: #include<iostream> using namespac

题型:单项选择题

问题:

有如下程序:
#include<iostream>
using namespace std;
class Base
public:
void fun()cout<<"Base::fun"<<endl;
;
class Derived:public Base
public:
void fun()
______
cout<<"Derived::fun"<<endl;

;
int main()
Derived d;
d.fun();
return 0;

已知其执行后的输出结果为:
Base::fun
Derived::fun
则程序中下画线处应填入的语句是______。

A.Base.fun();
B.Base::fun();
C.Base->fun();
D.fun();

考点:计算机等级考试C++C++语言笔试
题型:单项选择题

为使木柴燃烧旺一些,通常把木柴架起来燃烧,而不平放在地上燃烧是因为(  )

A.散热快

B.降低了木柴着火点

C.使木材和空气充分接触

D.木柴是可燃物

题型:单项选择题

用括号内动词的适当形式填空。

1. Mary _____________ (cook) nice food for her family now.

2. Look! It _____________ (snow) now.

3. We _____________ (write) a book this month.

4. It _____________ (get) dark. Let's go home.

5. My father _____________ (play) chess with my uncle now.

6. Mary _____________ (come) soon.

7. Listen! The mouse _____________ (eat) candies.

8. Excuse me, why are you _____________ (cry)?  I lost my book.

9. I'm sorry! You can't come in Dad _____________ (sleep).

10. It _____________ (rain) outside. Please close the window!

11. Listen, the telephone _____________ (ring).

12. What _____________ the boy _____________ (do) on the road?  He _____________ (ride) a bike.

13. The birds _____________ (fly) over the sea.

14. The bananas  (get) ripe.

15. Look. He _____________ (dance) beautifully.

题型:单项选择题

洋葱贮藏的适宜环境条件是温度0℃左右,相对湿度为65—70%。贮藏品质与采收成熟度无关。

题型:单项选择题

          is an American girl,and          name is Mary.

A.Her; her

B.She;her

C.She;She’s

D.She ; his

题型:单项选择题

设有三个基本表,表的结构如下所示,请用SQL完成下列查询:

BORROWER.

LOANS:

BOOKS:

 

①检索至少借了5本书的同学的借书证号、姓名、系名和借书数量

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