化简比.4:6;13:4;2.45:1.4.

题型:解答题

问题:

化简比.
4:6;
1
3
:4;2.45:1.4.
考点:比的化简
题型:解答题

I still remember my middle school life in Tianjin yet. I was then           1. _______

in a school for students from Tibet. As we were all left home       2. _______

at early age, we met lots of problems in our daily life. We                   3. _______

had to do the washing, cleaning and shopping by us. However,           4. _______

we seldom felt lonely or helplessly. We enjoyed our happy life.          5. _______

At weekends, we would play basketball, swimming in the pool             6. _______

or go for a picnic. We were living in a big family. We treat                     7. _______

each other as brothers and sisters. If any one of us had any                    8. _______

difficulty in our life and study, the other would help him out.              9. _______

It has been five years when we graduated, but those memories            10. _______

are as sweet as ever before.

题型:解答题

()通过对会员保证金的管理、控制而有效控制市场风险,以保证期货市场平稳运行。

A.期货公司

B.期货结算机构

C.期货中介机构

D.中国期货保证金监控中心

题型:解答题

下列关于有机物结构特点的说法正确的是:

A.球棍模型是按照有机物的真实构型按比例放大得到的

B.所有的有机物都存在同分异构体

C.化学式符合CnH2n+2的有机物都是烷烃

D.甲烷分子中的四个键角是相同的,但是四条共价键的键长是不同的

题型:解答题

对X线产生效率的说法,正确的是:()

A.很高

B.很低

C.一般

D.50%

E.100%

题型:解答题

脉压增大主要见于

A.心包积液

B.心肌梗死

C.心动过速

D.动脉硬化

E.休克

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