尾水管放空盘形阀的阀座安装,其水平及偏差不应大于()。 A.0.05mm B.0.2

题型:单项选择题

问题:

尾水管放空盘形阀的阀座安装,其水平及偏差不应大于()。

A.0.05mm

B.0.20mm

C.0.20mm/m

D.0.50mm/m

考点:水轮机安装工水轮机安装工(高级)水轮机安装工(高级)题库
题型:单项选择题

根据上下文或括号里的汉语提示,在下面短文的空白处写出正确的单词或词组,使短文意思完整,

语句连贯。

     About more than a hundred years ago, an American produced a game. He called it 1.              (室内的)

tennis. The Americans were not interested in it 2.              (起初), but he sent it to his London friends and

it became very 3.              (流行的) in Britain. The game was then played across dining-room tables,

or 4.              (在地板上) with the net strung (用绳缚) 5.              (在……之间) two chairs. The

balls 6.             (由…制成) cork(软木)or rubber. The bats were made of wood. 7.              (几年之后) a

hollow (空心的) ball like the one we use today was invented. The game then 8.              (快速地) spread

all over the world. An Englishman once made a bat covered with rubber. He first sold the game in England

and called it "Ping-pong". "Ping" was the 9.              (声音) of the bat when it hit the ball, and "pang" was

the 10.              (第二) sound of the ball when it hit the table.

题型:单项选择题

绿色植物和微生物在物质循环中的作用是什么?

题型:单项选择题

按Curreri公式计算每日补充热卡

A.2800keal

B.3000kcal

C.5300kcal

D.3500kcal

E.4800kcal

题型:单项选择题

在塔板的设计中,若气、液量一定,增大塔板的开孔率,液沫夹带线()。

A.不变 

B.上移 

C.下移 

D.不确定

题型:单项选择题

微机调节器中的通信联络插板用于人机对话,实现数据调整,控制操作的。

更多题库