在用于治疗胃酸过多的药物中，常含有氢氧化铝，它起什么作用？写_爱下问搜题

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问题问答题简答题

在用于治疗胃酸过多的药物中，常含有氢氧化铝，它起什么作用？写出化学方程式。

答案

参考答案：

氢氧化铝可以中和胃里的盐酸.Al（OH）3+3HCl==AlCl3+3H2O

完形填空

Miracles（奇迹）will happen if you don't give up trying. Even if you have 16 for one hundred times, you may succeed when you try for the 10lst time.
When I was born, my doctor told my mother that there was something wrong with my 17 . They were too soft to be able to walk. Although the news was bad, my mother didn't become 18 . She didn't believe what the doctor said 19 started to look for other ways.
My mother kept looking for other doctors for me, and finally she 20 . The doctor and his team in the hospital did 21 they could to help me. They also asked my parents to teach me to do some 22 to help me walk. One day when my mother came to pick me 23 . I crawled(爬) towards her. She was so surprised and happy that she couldn't believe 24 eyes. Crawling was not walking, but it was a good 25 . Day by day, I could walk by myself.
When I grew up, my mother 26 told me these stories. She said that if I thought of what she said whenever I met 27 , I could do anything successfully. I have been working hard and I have turned out to be a very 28 person. I get best 29 in school and I am a good dancer and swimmer. Thanks to my mother's strong resolution(决心), I live a 30 life now. What the story tells us, as my mother always says, is: Never give up.

C．frustrated(沮丧的)

B．experiments

D．difficulties

单项选择题

抽出风筒的入口应滞后压人风筒的出口（）m以上。

A、4

B、5

C、6