如下图所示,电阻R1=8Ω,R3=4Ω,开关闭合后,电压表V1的读数是14V,V

题型:问答题

问题:

如下图所示,电阻R1=8Ω,R3=4Ω,开关闭合后,电压表V1的读数是14V,V2示数为10V,

求:(1)电阻R2

(2)电源电压  

(3)电路消耗的总功率.

考点:电阻的串联欧姆定律及其应用串联电路的电流规律串联电路的电压规律电功率的计算
题型:问答题

可以用数值表示的标志种类有()。

A.土地面积

B.出让价格

C.土地出让方式

D.出让年限

E.出让数量

题型:问答题

Mini Book Excerpts (节选)

Biography

When Salinger learned that a car park was to be built on the land, the middle-aged writer was shocked and quickly bought the neighboring area to protect it… The townspeople never forgot the rescue and came to help their most famous neighbor.

J. D. Salinger: A Life by Kenneth Slawenski (Random House, $27)

Mystery (疑案小说)

"You're a smart boy. Benny's death was no accident, and you're the only who saw it happen. Do you think the murderer should get away with it?" The boy was staring stubbornly at his lap again.

A thought suddenly occurred to Annika, "Did you …You recognized the man in the car, didn't you?"

The boy hesitated, twisting his fingers, "Maybe," he said quietly.

Red Wolf by Liza Marklund (Atria Books, $25.99)

Short Stories

She wants to say to him what she has learned, none of it in class. Some women are born stupid, and some women are too smart for their own good. Some women are born to give, and some women only know how to take. Some women learn who they want to be from their mothers, some who they don't want to be. Some mothers suffer so their daughters won't. Some mothers love so their daughters won't.

You Are Free by Danzy Senna (Riverhead Books, $15)

Humor

Do your kids like to have fun? Come to Fun Times! Do you like to watch your kids having fun? Bring them to Fun Times! Fun Times!'s "amusement cycling" is the most fun you can have, legally, in the United States right now. Why spend thousands of dollars flying to Disney World when you can spend less than half of that within a day's drive of most cities?

Happy: And Other Bad Thoughts by Larry Doyle (Ecco, $14.99)

小题1:If the readers want to know about the life of Salinger, they should buy the book published by ________.

A.Ecco

B.Atria Books

C.Riverhead Books

D.Random House小题2:The book Happy And Other Bad Thoughts is intended for ________.

A.young children

B.Disney World workers

C.middle school teachers

D.parents with young children小题3: Which book describes women with characters of their own?

A. Happy And Other Bad Thoughts

B. J. D. Salinger: A Life

C. You Are Free

D. Red Wolf

小题4: After finishing the book Red Wolf, the readers would learn that ________.

A.the boy helped arrest the murderer

B.Benny died of an accident

C.the murderer got away with the crime

D.Annika carried out the crime

题型:问答题

人巨噬细胞的吞噬功能检测,下列说法正确的是()

A.用人巨噬细胞和绵羊的红细胞混合后孵育

B.用人巨噬细胞和鸡的红细胞混合后孵育

C.巨噬细胞吞噬CRBC百分率和吞噬指数判断其吞噬功能

D.吞噬指数=(吞噬CRBC的巨噬细胞数/200)

E.观察CRBC消化程度来反映巨噬细胞的消化功能

题型:问答题

下列属于内疝的是()。

A、脐疝

B、阴囊疝

C、会阴疝

D、膈疝

E、腹壁疝

题型:问答题

下列哪项不是疫毒痢的发病诱因:()

A.饥饿

B.感受寒凉

C.不洁饮食

D.疲劳

E.其他疾病后体弱未愈

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