直线x-2y+1=0关于直线x=1对称的直线方程是[ ]
A.x+2y-1=0
B.2x+y-1=0
C.2x+y+3=0
D.x+2y-3=0
答案:D
阅读短文,从括号中选择正确的单词填空,使短文通顺连贯。
This is the room of Li Lei. It's a 1 (nice/well) room. You can see a bed, two 2 (tables/table), a chair and a soccer ball on the floor. What can you see 3____ (on/in)the wall? You can see some 4 (picture/pictures). Where's 5____ (a/the)light(灯)? It's on 6 __ (a/the/an) table. Some
books are on this table 7_____(to/too). Where 8 (are/is) his pencil case and pens? They are on the
other(另一个)table. You can see a clock 9 ___ (under/on)it. Under the chair is 10 (his/her)soccer
ball.
下列关于我国人造地球卫星“东方红1号”的说法中,不正确的是[ ]
A.它是我国第一颗人造地球卫星
B.1970年被送入太空轨道
C.用“长征1号”运载火箭发射升空
D.世界上最早的人造卫星