关于物体的惯性,下面说法中正确的是( ) A.一切物体在任何情况下都有惯性 B.

题型:选择题

问题:

关于物体的惯性,下面说法中正确的是(  )

A.一切物体在任何情况下都有惯性

B.物体不受外力时有惯性,受外力时就没有惯性

C.运动的物体有惯性,静止的物体没有惯性

D.静止的物体有惯性,运动的物体没有惯性

考点:惯性现象
题型:选择题

学了化学后,你认为下列做法合理的是(  )

A.青少年适量补充微量元素铁以预防佝偻病

B.用甲醛浸泡海产品,延长海产品的保质期

C.用含亚硝酸钠(NaNO2)的工业盐腌制食品

D.用小苏打作焙制糕点的疏松剂

题型:选择题

银汞合金性能的改进,主要着重于()

A.去除所含锌的成分

B.采用球形银合金粉

C.去除所含银汞相

D.去除所含锡汞相

E.都不正确

题型:选择题

My house is made of wood, glass and stone. It is also made of software.

If you come to visit, you'll probably be surprised when you come in: Someone will give you an electronic PIN to wear. The PIN tells the house who you are 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 near 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 for you. 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 want something. There is a home control console (控制台) which is 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 the key to my car, you can use my car. The car works for you because you have the key. My house works for you because you wear the PIN or hold the console.

I believe that in ten years from now, most new houses 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 got.

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 did I live without them?”

小题1:The writer’s house is made of the following EXCEPT_________.

A.bamboo

B.wood

C.glass

D.software小题2:What is the writer most likely to be according to the passage?

A.An IT expert.

B.A famous doctor.

C.A sportsman.

D.An experienced teacher.小题3:The writer's new house is different from ordinary ones mainly because______________.

A.it has your favorite music following you

B.you can make a telephone call anywhere

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

D.it is controlled by computers小题4:What does the passage mainly discuss?

A.How to develop a new system.

B.The function of the PIN.

C.How great the computers are.

D.Easy life in the future.

题型:选择题

crp及腺苷酸环化酶基因突变的细菌都不能合成lac mRNA。 ( )

题型:选择题

发证机关对因故收回、作废的《药品经营许可证》,应建档保存( )

A.法定凭证
B.5年
C.伪造、出租
D.许可事项变更
E.工作档案

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