从家到学校小红要7分钟，小明要6分钟，小红和小明所行速度比是（ ） A．7：6 B．

在平面直角坐标系中（如图每格一个单位）

（1）作出下列各点（-2，-1），（2，-1），（2，2），（3，2）（0，3），（-3，2），（-2，2），（-2，-1）并依次将各点连接起来（说说所连图形象什么）；

（2）所得图形整体向右平移2个单位，说出对应点的坐标发生了怎样的变化？

如果一个人的右臂动脉破裂出血，这时你正在身边，你怎样紧急抢救（　　）

A．包扎近心端的动脉

B．包扎远心端的动脉

C．包扎近心端的静脉

D．包扎远心端的静脉

语法填空

     We arrived at Chiang Mai at 9 p. m.It wasn't 1.________two days later that we were able to take a

closer look at Thai elephants.2.________our stay there,we visited the Measa Elephant Camp,some 20

minutes' drive from the city center.The camp,3.________ stands aside a rushing river in a lush tropical

valley,is the home of 78 elephants.When we arrived there in the early morning,many black elephants,some with creamy white tusks,4.________(enjoy) their daily bath in the river.

     At Measa,we were amazed by the elephants' 5.________(astonish) skills.They could not only play

football and 6.________harmonica (口琴),but also paint incredibly wonderful pictures with 7.________

trunks.Little wonder then that Bangkok's little elephant accomplished the feat (技艺) vividly

8.________(describe) in the primary school textbook.

     At the end of the Thailand tour,everybody in the group seemed to be attracted by these elephants as all of 9.________rushed to purchase elephant sculptures,toys,ornaments and Tshirts.I was no

10.________(except). The elephantpendant (坠饰) key chains I bought turned out to be popular gifts for my colleagues.

已知学生选课信息表：sc(sno，cno，grade)。查询“至少选修了一门课程，但没有学习成绩的学生学号和课程号”的SQL语句是( )。

A．SELECT sno，cno FROM sc WHERE grade=NULL

B．SELECT sno，cno FROM sc WHERE grade IS"

C．SELECT sno，cno FROM sc WHERE grade IS NULL

D．SELECT sno，cno FROM sc WHERE grade=''

浓缩饲料