0.2S、0.5S有功电能表，其检定周期一般不超过（）A、5年 B、6年 C、8年

若关于x的一元二次方程x2+px+q=0的两根分别为x1=2，x2=1，则p，q的值分别是

A．－3，2

B．3，-2

C．2，－3

D．2，3

短文改错

     Dear Jim,

     I am so exciting that you will come to China.I will free from December 18 and will have a plenty of

time to be together with you.I'll meet you at the airport and then you will take Bus No.8 for my home.You

worry about the weather here in your email.In fact,the weather here is quite different from it in your city.

It isn't very cold,but you needn't bring many clothes with you.During your stay here,I'll take you to some

places of interests and you can taste some local snacks.I am sure we will have greatly fun together.

Looking forward to meeting you soon.

     John

改错：________________________________________________________________________

标志着文人五言诗正式形成的作品是（）。

A.班固的《咏史》

B.屈原的《九歌》

C.“古诗十九首”

D.汉乐府民歌

在《城市房地产管理法》中规定，商品房预售应当持有建设工程( )。

A．开发许可证
B．规划许可证
C．施工许可证
D．销售许可证

在态度的成分中，起主导作用的是（ ）成分。

A．外显行为

B．情感

C．行为倾向

D．认知