下列不属于生物的是 A.病毒 B.草履虫 C.钟乳石 D.柳树

题型:选择题

问题:

下列不属于生物的是

A.病毒

B.草履虫

C.钟乳石

D.柳树

考点:生物及其特征
题型:选择题

男性,50岁,右示指玻璃切割伤,指深、浅屈肌腱均断裂

A.近侧指间关节不能主动屈曲
B.远侧指间关节不能主动屈曲
C.掌指关节不能主动屈曲
D.两个指间关节均不能主动屈曲
E.两个指间关节和掌指关节均不能主动屈曲

题型:选择题

用如图所示装置来验证动量守恒定律.质量为mA的钢球A用细线悬挂于O点,质量为mB的钢球B放在离地面高度为H的小支柱N上,O点到A球球心的距离为L,使悬线在A球释放前伸直,且线与竖直线夹角为α,A球释放后摆到最低点时恰与B球正碰,碰撞后,A球把轻质指示针OC推移到与竖直线夹角β处,B球落到地面上,地面上铺有一张盖有复写纸的白纸D,保持α角度不变,多次重复上述实验,白纸上记录到多个B球的落点.(已知当地的重力加速度为g)

(1)为验证两球碰撞过程动量守恒,应测出数值的物理量有S以及______.(用题中字母表示)

(2)用测得的物理量表示碰撞前后A球、B球的动量:PA=______,PA′=______.PB=0,PB′=______.

题型:选择题

“味归形,形归气”是指气的()

A.推动作用

B.温煦作用

C.防御作用

D.固摄作用

E.气化作用

题型:选择题

男性,40岁。查体发现肋骨病变,X线片和CT片如图。应首先考虑的诊断是()

A.软骨瘤

B.骨囊肿

C.骨巨细胞瘤

D.骨纤维异常增殖症

E.成软骨细胞瘤

题型:选择题

阅读理解。

     Many teenagers feel that the most important people in their lives are their friends. They believe that their

family members don't know them as well as their friends do. In large families, it is quite often for brothers

and sisters to fight with each other and then they can only go to their friends for some ideas.

     It is very important for teenagers to have one good friend or a group of friends.Even when they are not

with their friends,they usually spend a lot of time talking among them on the phone. This communication is

very important in children's growing up, because friends can discuss something. These things are difficult

to say to their family members.

     However, parents often try to choose their children's friends for them. Some parents even stop their

children from meeting their good friends. Have you ever thought of the following questions?

     Who chooses your friends? Do you choose your friends or your friends choose you? Have you got a

good friend your parents don't like? Your answers are welcome.

1. _____ is very important to teenagers. [ ]

A. To make friends

B. Communication

C. To stop meeting friends

D. Both A and B

2. When teenagers have something difficult to say to their parents, they usually _____.[ ]

A. stay alone at home

B. fight with their parents

C. discuss it with their friends

D. go to their brothers and sisters for help

3. The sentence "Your answers are welcome" means "_____". [ ]

A. You are welcome to discuss the questions with us

B. We've got no idea, so your answers are welcome

C. Your answers are always right

D. Your can give us all the right answers

4. Which of the following is the writer's attitude? [ ]

A. Parents should choose friends for their children.

B. Children should choose everything they like.

C. Parents should understand their children better.

D. Teenagers should only go to their friends for help

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