平舱舵舵叶部分面积在舵杆轴线的前方,其目的是() A.增加回转力矩; B.减小回转力

题型:单项选择题

问题:

平舱舵舵叶部分面积在舵杆轴线的前方,其目的是()

A.增加回转力矩;

B.减小回转力矩

C.使舵绕舵轴的回转力矩小,从而使船舶所需舵机功率小

D.改善水流分布

考点:船舶结构与货运舵设备舵设备题库
题型:单项选择题

不符合动物医院法定条件的是()

A、有手术台

B、具有污水处理设备

C、距离畜禽饲养场300m

D、出入口设在居民住宅楼道内

E、有完善的疫情报告管理制度

题型:单项选择题

关于小体本质的叙述,正确的是()

A.脂肪变性引起

B.胞核残留物

C.巨大深染的嗜天青颗粒

D.裸核

E.胞质局部不成熟

题型:单项选择题

阅读理解。

     My house is made out of wood, glass and stone. It is also made out of software. If you come to visit,

you'll probably be surprised when you come in. Someone will give you an electronic PIN (个人身份号码)

to wear. This PIN tells the house who and where you are. The house uses this information to give you what

you need. When it's dark outside, the PIN turns on the lights nearest you, and then turns them off as you

walk away from them. Music moves with you too. If the house knows your favorite music, it plays it. The

music seems to be everywhere, but in fact other people in the house hear different music or no music. If

you get a telephone call, only the nearest telephone rings.

     Of course, you are also able to tell the house if you want something. There is a home control console

(控制台), a small machine that turns things on and off around you.

     The PIN and the console are new ideas, but they are in fact like many things we have today. If you want

to go to a movie, you need a ticket. If I give you my car keys, you can use my car. The car works for you

because you have the keys. My house works for you because you wear the PIN or hold the console.

     I believe that ten years from now, most new homes will have the systems that I've put in my house. The

systems will probably be even bigger and better than the ones I've put in today.

     I like to try new ideas. I know that some of my ideas will work better than others. But I hope that one

day I will stop thinking of these systems as new, and ask myself instead, "How will I live without them?"

1. What does the passage mainly discuss?[ ]

A. How to develop a new system.

B. The function of the PIN.

C. A home for the future.

D. Easy life in the future.

2. What's the purpose when the writer wrote the fourth paragraph? [ ]

A. To let readers know why his ideas are new.

B. To let readers know how special his house is.

C. To explain the importance of the PIN and the console.

D. To explain more easily what the functions of the PIN and the console are.

3. The writer's new house is different from ordinary ones mainly because _____.[ ]

A. it has been controlled by computers

B. you can make a telephone call anywhere

C. it has your favorite music following you

D. the writer is able to change his new idea into practice

4. What is the writer most likely to be according to the passage? [ ]

A. An IT expert.

B. A famous doctor.

C. An idealist.

D. An experienced teacher.

5. What can't be done in the writer's new house? [ ]

A. turns on the lights

B. play music

C. get a telephone call

D. go swimming

题型:单项选择题

以计税依据为标准,关税分为()

A.从价税

B.从量税

C.复合税

D.选择税

E.滑准税

题型:单项选择题

读下图(阴影部分表示黑夜)回答相关问题。

图中A、B、C三点正午太阳高度从大到小的排列顺序是();这一天与A点正午太阳高度相同的另一条纬线的纬度是()。

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