下面哪个公式是正确的?()A、dBi=dBd+2.15 C、dBd=dBi+2.15

题型:单项选择题

问题:

下面哪个公式是正确的?()

A、dBi=dBd+2.15

C、dBd=dBi+2.15

B、dBi=dBd+2.50

D、dBd=dBi+2.50

考点:通信工程师WCDMA网络优化WCDMA网络优化题库
题型:单项选择题

China is larger than _____ in Africa.

A.any other country

B.other countries

C.any countries  

D.any country

题型:单项选择题

Mr. Backer is a kind-hearted man. Once he gave some food to a poor woman . Mr White, the boss of the restaurant, found it and became angry. He often gave the leftovers(剩饭菜) to  some poor workers. Mr. Backers lost his work for it. It was difficult for him to find work in the small country though he was an able cook. The war made all stop. Children couldn't go  to school, most shops were closed, even some farmers were  hungry. Some people were made to leave their houses and they had to find the safe places. It was an autumn night. Mr Backer  hadn't any food to eat and went to bed, but he couldn't fall asleep, because he was very hungry . suddenly he heard a noise in  his room. He saw a man looking for something useful there. He said nothing and watched it carefully. At last the man took a few old clothes out of a broken paper box and took them away. He got up from his bed quickly and followed him gently(文雅地), with his quilt on his back. The man didn't find him and went into a small and wet house. Mr. Backer also went in and saw there was nothing in the room. The thief(贼) saw him and was surprised. He asked, “What did you come here for?” “You have carried my things here,” said Mr. Backer. “I have to move here, too!”   

小题1:Mr White sent Mr. Backer away because            .

A.he couldn't cook

B.he didn't work hard

C.he didn't like him at all

D.he gave some leftovers to the poor woman小题2:       , so the people in the small country got into trouble.

A.The war broke out(爆发)

B.It didn't rain

C.Children couldn't go to school

D.Shops and factories were closed小题3:Mr. Backer couldn't go to sleep because               .

A.the weather was cold

B.the weather was hot

C.he was hungry

D.he was ill小题4:Mr. Backer said nothing when the thief went into his room because        .

A.he wanted to send him to the police station

B.there was nothing expensive there

C.he was afraid the man could hurt him

D.he hoped the man could help him小题5:The underlined word “quilt” in this story means               .

A.珠宝

B.钱箱

C.被子

D.鞋带

题型:单项选择题

— Are you worried when your son often plays computer games?

— Yes. I think playing computer games _____ on teenagers. [ ]

A. have a good effect

B. has a good effect

C. has a bad effect

D. have a bad effect

题型:单项选择题

如图所示装置处于静止状态,不计滑轮重和绳重,如果物体的重力分别为G1 和G2,那么G1 和G2 的关系是

[ ]

A. G1 = G2      

B. G1 =2G2    

C. G1 = 1/2G2

D. 无法判断

题型:单项选择题

如图所示,光滑半球形容器固定在水平面上,O为球心,一质量为m的小滑块,在水平力F的作用下静止在P点。设滑块所受支持力为FN。OP与水平方向的夹角为θ。下列关系正确的是()

A.

B.F=mgtanθ

C.

D.FN=mgsinθ

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