问题
选择题
点A（-3，5）与B（5，5）关于某一直线对称，则对称轴是（ ）
A．x轴
B．y轴
C．直线x=1
D．直线y=1
答案
∵点A（-3，5）与B（5，5），两点纵坐标相等，
∴两点关于过线段中点的直线对称，即关于直线x=
=1对称．5-3 2
故选：C．
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点A（-3，5）与B（5，5）关于某一直线对称，则对称轴是（ ）
A．x轴
B．y轴
C．直线x=1
D．直线y=1
∵点A（-3，5）与B（5，5），两点纵坐标相等，
∴两点关于过线段中点的直线对称，即关于直线x=
=1对称．5-3 2
故选：C．
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| It was on the afternoon of June 11, 2010. Mr Smith looked at his watch at times. He 1 to go home as soon as possible. There would be a 2 football match in South Africa. This is South Africa's World Cup opening match. He couldn't miss it and he could not do anything in his office. He 3 home after work. Supper was ready and he went to his 4 after that. But he could not fall asleep. He was afraid he would __5 the match though he had told his wife to wake him up in the night. He had to 6 and began to read some evening newspapers. Finally the match began. His team lost the _ 7 half of the match. He became angry. He was so sleepy that he did not know when he had gone to 8 . The next morning his wife brought some bread and milk into the sitting-room. She found he was 9 sleeping on the sofa and called out "Oh, dear! Get up, or you'll be __10 today. It is five to seven！" Hearing this, Mr Smith jumped off the sofa and asked, "Who won?" | ||||
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