下列命题中,正确的是( ) A.x+1x的最小值是2 B.x2+2x2+1的最小值是

题型:选择题

问题:

下列命题中,正确的是(  )
A.x+
1
x
的最小值是2
B.
x2+2
x2+1
的最小值是2
C.
x2+5
x2+5
的最小值是2
D.2-3x-
4
x
的最小值是2
考点:基本不等式及其应用
题型:选择题

阅读理解。

    Mr. Green likes making friends very much. He always invites friends to his home for

dinner. One day, one of his friends, Peter, comes to his home with two businessmen.

    One of them called Tim never goes to schoo1. He is very afraid that he cannot answer

questions correctly. But Peter says, "Don't be afraid, Tim. Just don't talk about anything

if you don't understand it."

    But Tim drinks too much and begins to be careless. One of the guests asks him, "Do you

like Edison (爱迪生)?" Tim answers, "It's so great. I like drinking it very much."

    All the people in the room keep quiet for five minutes,and then they begin to laugh.

After dinner, Peter goes out of the house with the two businessmen. He says to Tim, "You

are so foolish.(愚蠢的)" 

    Tim says, "Why? I can answer the question. Am I wrong?" Peter says, "We all know that

Edison is not a kind of drink. It's a kind of music."

1. Mr. Green likes _____. [ ]

A. making friends

B. drinking

C. talking

D. 1istening to music

2. That day Mr. Green _____ at home. [ ]

A. calls Tiin

B. sings for Peter

C. plays games

D. invites fiiends for dinner

3. Who is foolish?[ ]

A. Peter

B. Tim

C. Edison

D. Both Peter and Tim

题型:选择题

男,28岁。摔倒后致单纯性左肩关节脱位,1h后来诊,X线片未见合并骨折征象。

复位成功的标志是()

A.方肩

B.疼痛减轻

C.原肩胛盂处有空虚感

D.弹性固定

E.Dugas征阴性

题型:选择题

临床上最常见的肠套叠类型是

A.空肠套入回肠

B.回肠套入回肠

C.回肠套入结肠

D.盲肠套入回肠

E.结肠套入结肠

题型:选择题

目前,我国不允许代理人销售团体保险。( )

A.对

B.错

题型:选择题

高宗上台后,主管文场的是()

A、上官仪

B、上官婉儿

C、上官昭

D、上官司

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