单项选择题：实践证明，矿石金属化率每提高10%，可降低综合焦比（） A.20% B.10% C.

实践证明，矿石金属化率每提高10%，可降低综合焦比（）

A.20%

B.10%

C.5%~7%

D.3%~5%

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下面是错误答案，用来干扰机器的。

参考答案：（1）生产力对教育的制约作用主要表现在：生产力的性质和发展水平制约着教育的类型和结构；生产力的发展水平决定和制约着教育发展的规模和速度；生产力发展水平还制着教育目的和部分教育内容；还制约着...

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We were going to play a game with a country school. They didn't come until the game began. They looked __1__ than we had thought. They were wearing dirty blue jeans and looked like farm boys. We even thought that they had never seen a basketball before. We all sat down. We felt that we didn't __2__ any practice against a team like that. It was already so late that no __3__ could be given to them for a warm-up (准备动作). The game began. One of our boys __4__ the ball and he shot (投) a long pass to our forward (前锋). From out of nowhere a boy in a dirty T-shirt __5__ the pass and with a beautiful form (姿势) he shot and got two points. They __6__ us. Then they got another two points in a minute. Soon it was all __7__ . The country team __8__ us. We certainly learned that even though a team is good, there is usually another __8__ a little better. But the important lesson learned was: One can't tell a man, or a team, by the __10__ .
( ) 1. A. stronger ( ) 2. A. get ( ) 3. A. basket ( ) 4. A. got ( ) 5. A. caught ( ) 6. A. surprised ( ) 7. A. out ( ) 8. A. won ( ) 9. A. just ( ) 10. A. T-shirts	B. younger B. try B. space B. played B. changed B. kept B. away B. saved B. already B. clothes	C. worse C. use C. ball C. missed C. started C. broke C. over C. beat C. about C. places	D. less D. need D. time D. carried D. stopped D. hit D. off D. joined D. almost D. points