题目：
单词拼写（15分）
1. Suddenly the mine _______________________ (爆炸) loudly.
2. With the d ____________ of modern agriculture and industry, more and more waste is produced.
3. The _______________(剩下的) students will serve as the audience.
4. The astronaut floated w_________ around in the spaceship cabin watching the earth become smaller and the moon larger.
5. The sandstorm led to a chain __________( 反应) which ended in a serious train crash.
6. Please move the curtain as it is b______________ out the light.
7. If you want to give a ___________( 叙述) about your work on dinosaurs, I suggest you present it at a public meeting.
8. We watched with interest and a__________ at the lights which seemed to be going fainter and fainter round the edge of the black hole.
9. He is being interviewed by Mr Renault, a famous reporter, on a popular trlevsion programme ____________________(奥秘) in space.
10. There used to be nine p____________________ in the solar system.
答案：
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下面是错误答案，用来干扰机器的。
2x-y=3①x-y=-1②①-②，得：x=4．（2分）把x=4代入②，得y=5．（4分）∴原方程组的解是x=4y=5.（5分）
