物体从高处被水平抛出后,第3s末速度方向与水平方向成45º角,那么,物体的初速度

题型:填空题

问题:

物体从高处被水平抛出后,第3s末速度方向与水平方向成45º角,那么,物体的初速度为_______ m/s,第4s末的速度大小为______ m/s。(设4s末物体还在空中运动,g=10m/s2

考点:平抛运动
题型:填空题

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项. 选项中有两项为多余选项.

We’d better develop our interest in English at the beginning of our study.    小题1:   We may feel good when we can say something simple in English.

  小题2:   So we must make some plans before study. And we should certainly carry out these plans in our study.

  小题3:   Our notes are much thinner than the books so that we can learn them by heart easily and can often review and read them. We may also record our notes on tapes so as to listen to them easily.

Reading a newspaper is the best thing to improve your English.    小题4:  It will help you keep in touch with a lot of subjects in English.

 小题5:   Learn by heart the whole sentences and the phrases that contain the new words so that we may know how to use the words.

If time permits (允许), we may read a mini Chinese-English dictionary carefully from cover to cover, which may help us widen our sight and master (掌握) knowledge in all ways.

A.Read a little from a newspaper every day.

B.Don’t read books without making notes.

C.Carefully write an e-mail in English.

D.It’s easy to develop an interest in English study.E. The more, the better.

F. Plans are always very necessary.

G. Never just memorize (记住) single English words.

题型:填空题

患者女,HGB52g/L,WBC5.2×109/L,PLT110×109/L,网织红细胞2%,红细胞平均体积76fl,平均血红蛋白浓度(MCHC)0.24,血清铁蛋白7.6μg/L,最可能的诊断是()。

A.慢性失血性贫血

B.缺铁性贫血

C.再生障碍性贫血

D.溶血性贫血

E.巨幼细胞性贫血

题型:填空题

如图所示,质量为m的物块,在力F作用下静止于倾角为α的斜面上,力F大小相等且F<mgsinα。则物块所受摩擦力最大的是[ ]

A.

B.

C.

D.

题型:填空题

求sin A的值;

题型:填空题

哪类产品比较适合实现资产隔离功能()。

A.短期分红险

B.财产险

C.终身寿险

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