锥的母线长5cm,底面半径长3cm,那么它的侧面展开图的圆心角是( )。

题型:填空题

问题:

锥的母线长5cm,底面半径长3cm,那么它的侧面展开图的圆心角是(    )。

考点:圆锥的计算
题型:填空题

短文填词 (共10小题,每空1分,满分10分)

Dear Mary,

In your last letter, you asked me how to have a better school life.

小题1:Here are some of my s     . First, I hope our school will open the

小题2:_______(图书馆) more often. Second, I think our school can organize

小题3:m___ after-class activities but fewer exams . Next I hope our school will

小题4:give us more time for sports, art and music. As for our ______, I hope

小题5:they will be our friends and try ______ best to make classes more interesting.

小题6:And, i       they can talk less but more clearly in class, we will be more

小题7:interested in studying and have more time to _______(练习). Besides,

小题8:I hope they will give us less homework and finish classes _______ time.

小题9:I hope that my advice will be _______(有帮助).

小题10:Looking forward to h      from you.

Yours sincerely,

LiLei

题型:填空题

_______our school’s teaching reform, the studying burdens on us students have already______lighter than before.

A.Owing to; turned on

B.Due to; turned over

C.Despite; turned around

D.Thanks to; turned out

题型:填空题

.一个物体在5s内运动了10m,又以3m/s的速度运动了45m,那么,这个物体在前5s内的平均速度是            ,在55m内的平均速度是             

题型:填空题

男,28岁。患急性肾炎两周后出现少尿、水肿并发急性肾衰竭。体检:血压23/14kPa(173/105mmHg),眼睑及皮下水肿明显,两肺底可闻及细小湿啰音。化验:尿液检查蛋白(++),红细胞20/HP~25/HP,血红蛋白110g/L,血Cr720μmol/L,CO2 CP18mmol/L,血C3降低,眼底检查,动、静脉轻度交叉压迹。

根据病情可以食用的蔬菜是

A.蘑菇

B.荠菜

C.马铃薯

D.榨菜

E.油菜

题型:填空题

体外分子进化是使核酸分子在体外经过多次酶催化的扩增,从而积累突变的过程。( )

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