燃料油泵运行中的检查内容是()。A、泵体循环冷却水是否投用 B、电机、泵体是否有杂音

题型:单项选择题

问题:

燃料油泵运行中的检查内容是()。

A、泵体循环冷却水是否投用

B、电机、泵体是否有杂音

C、泵体伴热是否投用

D、盘车正常

考点:聚酯装置生产操作工中级聚酯装置生产操作工中级聚酯装置生产操作工题库
题型:单项选择题

在短文的空格内填入适当的词,使内容通顺,每空格限填一词,首字母已给出。

     The Empire State Building (帝国大厦) has held a special place in the hearts of Americans since it

was completed in 1931.It r__1__ more than 443 metres into the sky. For more than forty years , it was

the tallest building in the world.

     It has one hundred and three levels and six thousand five hundred windows. Visitors can ride in one

of seventy-three elevators that take them from the b__2__ to very near the top of the building. Some of

these elevators are very fast, reaching the eightieth floor in only forty-five seconds.

     The heads of government of almost every n__3__ in the world have visited the Empire State Building.

These important people are just a few of million who have ridden to the observation area near the top of

the building each year. From there, visitors can see almost all of New York City. They can see the view

a __4     the Hudson River into the state of New Jersey. They can see ships in the East River.

     Even if you have never visited New York, there is a good chance for you to see the Empire State

Building. It has been photographed c __5__ times. It has even played parts in movies. One is about a

huge ape (猿) that escapes and climbs to the top of the building. The movie is "King Kong" (金刚). It

was made in 1933. The Empire State Building also appeared in the love story "An Affair to Remember"

(金玉盟). Cary Grant and Deborah Kerr play a man and a woman who meet and fall in love on a ship.

They are looking at the New York City skyline from the ship when they plan a future meeting.

     More recently, in "Sleepless in Seattle (西雅图未眠夜)", two people in love agree to meet at the

Observation Deck on Valentine's Day (情人节). B__6__ do arrive, but one is a little later. They almost m     7__each other.

     In the early nineteen seventies, the Empire State Building lost its place as the tallest building in New

York. People in the city then had the Twin Towers of the World Trade Center to look up to. Tragically

that all changed on the morning of September 11,2001. Terrorists hijacked (劫持) passenger airplanes

into the Twin Towers and destroyed them. The Empire State Building again has become the city's tallest

building.

题型:单项选择题

摆式列车是集电脑、自动控制等高新技术于一体的新型高速列车,当它转弯时,在电脑控制下,车厢会自动倾斜,产生转弯需要的向心力;行走在直线上时,车厢又恢复原状.靠摆式车体的先进性无需对线路等设施进行较大的改造,就可以实现高速行车.假设有一摆式超高速列车在水平面内行驶,以216 km/h的速度拐弯,拐弯半径为1.8 km,为了避免车厢内的物件、行李侧滑行和站着的乘客失去平衡而跌倒,在拐弯过程中车厢自动倾斜,车厢底部与水平面的倾角θ的正切tanθ约为[ ]

A.0.10  

B.0.20            

C.1.00    

D.2.00

题型:单项选择题

对于以井下岩层水为防尘水源的矿井,特别是水质偏酸或偏碱的岩层水,在管壁工作压力允许情况下,采用钢管效果较好。()

题型:单项选择题

同轴电缆干线传输系统特点()。

A、传输信号损耗较小

B、干线中所需串接放大器的数量少

C、传输信号电平在不同季节会出现较大波动

D、双向传输接续较复杂

E、对高频信号的衰减量大,对低频信号的衰减量小

题型:单项选择题

依据《电力建设安全工作规程》的规定,电源的使用下列哪些是正确的()。

A.不同电压的插座与插头应选用不同结构

B.用单相三孔插座代替三项插座

C.将电源直接插入插座内使用

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