有一个实心球形物体,用弹簧测力计在空气中称重时,测力计的示数为12N;当把物体一

题型:选择题

问题:

有一个实心球形物体,用弹簧测力计在空气中称重时,测力计的示数为12N;当把物体一半体积浸入水中时,测力计的示数为5N。把物体从弹簧测力计上取下投入水中静止时,物体受到的浮力是

A.5 N

B.7 N

C.14 N

D.12N

考点:浮力产生的原因
题型:选择题

任何数与0相乘都得0.______.(判断对错)

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一个长方形的长增加
1
2
,宽减少
2
3
,所得长方形的面积比原来长方形减少
()
()
题型:选择题

阅读理解。

     When Lew Alcindor was 13, and obviously still growing, a group of schools began offering him

scholarships (奖学金). The Alcindor's decided to send their only child to Power Memorial Academy, a small

school on Manhattan's West Side.

     At Power, Alcindor came under the control of coach Jack Donohue, a strict young man who already

gained his fame as one of the best coaches in the city. Donohue brought Alcindor along slowly. As a first-year

student, the boy was not able to do much but wave his long skinny arms and shoot a basket now and then.

But by the second year, when he was 15 years old and nearly 7 feet tall, Alcindor was quick and skillful enough

to make the high school All-American Team and to lead Power to an undefeated season.

     From then on he simply got better. Some rival coaches (对方教练) used to take their teams quickly away

from the floor before Power warmed up so that their players would not see him any sooner than they had to.

Wearing size 16D shoes and sucking a lollipop (棒棒糖), Alcindor would loosen up by starting his leaping lay-

ups (擦板球). Then he would casually shoot the ball with either hand, to the delight of the fans.

     When reporters and photographers began to follow Alcindor closely, Donohue protected his boy firmly.

He simply ordered Lew to talk to no member of the press, and this suited Lew fine. He was not comfortable

talking to grown-ups, perhaps because he towered over them. Discouraged photographers began following him

in secret as though he were an easily-frightened giraffe. Once after ducking into a subway to escape, Alcindor

told a friend that it was all becoming like policemen and robbers. "People want you not for yourself," Donohue

warned him, "but because you're a basketball player. Don't forget that."

1. Which of the following best describes Donohue as a young coach? [ ]

A. serious, popular and slow

B. tall, skillful and successful

C. kind, powerful and undefeated

D. well-known, strict and experienced

2. Why did Alcindor not to play an undefeated season when he just went to Power? [ ]

A. The coach didn't attention to him

B. Alcindor wasn't quick and skillful enough to do

C. As a first-year student was not able to do much

D. Because he was too young to play

3. Why did some rival coaches take their teams away from the floor before Power warmed up? [ ]

A. Their teams refused to play Power

B. Their teams feared to see Alcindor

C. Their teams would lose courage

D. Their teams would lose interest

4. What does the last paragraph mainly discuss? [ ]

A. How Donohue protected Alcindor from the press

B. How Alcindor disliked meeting reporters

C. Why the press followed Alcindor closely

D. Why the public wanted Alcindor badly

题型:选择题

女性,17岁。心慌多汗半年。近1个月出现多饮、多尿就诊。体检:明显消瘦,双眼略突出,甲状腺Ⅱ度大,双上极可闻及血管杂音。血Fr333.5pmol/L,FT440pmol/L,TSH0.01mU/L(0.01μU/ml)

甲状腺功能亢进控制后,糖尿病预后()

A.糖尿病可完全治愈

B.糖尿病进一步恶化

C.与甲状腺功能亢进病情变化无关

D.糖尿病病情无变化

E.糖尿病病情可减轻

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使用合并计算只可以使用本工作表内的数据区域。()

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