汽动活塞式给水泵的优点是( )。A.工作可靠,启动容易 B.容量较大 C.操作简便

题型:多项选择题

问题:

汽动活塞式给水泵的优点是( )。

A.工作可靠,启动容易

B.容量较大

C.操作简便,便于调节给水量

D.能适应较大的负荷变化

E.体积小

考点:质量员暖通质量员供热锅炉及附属设备安装
题型:多项选择题

阅读理解。

     We can see a picture of a classroom. It is our classroom. It's small. We have 25 students in our class.

The walls (墙) are white and the desks and chairs are new. On the wall there is (有) a flag (旗子) and a clock.

There is a map of China, too. Some plants are on the desk They are for our teacher, Miss Smith. She likes her

students. She comes to school early.

1. Our classroom is _______.

A. big

B. small

C. old

D. interesting

2. We have _______ students in our class.

A. thirty

B. fifteen

C. twenty-five

D. forty

3. _______ are one the wall.

A. A flag

B. A clock

C. A flag and a clock

D. A watch

4. _______ are on the desk.

A. Some books

B. Some plants

C. Some pens

D. Some plants

5. Our teacher is _______.

A. Miss Smith

B. Mr. Smith

C. Mrs. Smith

D. Smith Teacher

题型:多项选择题

郑成功诗云:“开辟荆榛逐荷夷,十年始克复先基。”据此你知道明末侵占我国宝岛台湾的西方殖民国家是[ ]

A.西班牙          

B.葡萄牙         

C.荷兰            

D.英国

题型:多项选择题

读南方地区图,写出图中数码代表的地理事物名称:

(1)矿产地:①_______铜矿②_________锑矿③________锡矿⑤__________煤矿⑥________________铁矿

(2)在矿产资源的分布中,我国南方_________________资源丰富。

题型:多项选择题

请定义一个函数名为A,返回值为int,没有参数的纯虚函数的定义是 ______ 。

题型:多项选择题

对突出危险的新建矿井,突出矿井的(),必须编制()设计。

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