多项选择题：对（）等基体，若采用外墙饰面砖，必须有可靠的粘结质量保证措施.A.加气混凝土 B.轻

题目：

对（）等基体，若采用外墙饰面砖，必须有可靠的粘结质量保证措施.

A.加气混凝土

B.轻质墙板

C.混凝土

D.轻质砌块

E.粘土砖

答案：

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I recently heard a story about a famous scientist who had made several very important medical breakthroughs.He was being interviewed by a reporter who asked him __1__ he thought he was able to be so much more __2__ than the average person. He __3__ that it all came from a(n)__4__ with his mother that occurred when he was about 2.He had been trying to remove milk from the fridge when he __5__ the slippery (光滑的) bottle，its contents running all over the kitchen floor. When his mother came in，__6__ shouting at him or giving him a lecture，she said， “Robert，what a great and wonderful __7__ you have made! I have __8__ seen such a huge pool of milk.Well，the damage has already been __9__.Would you like to get down and __10__ in the milk for a few minutes before we clean it up？”Indeed，he did.After a few minutes，his mother said，“Robert，whenever you make a mess like this，eventually you have to __11__ everything to its proper order.So，how would you like to do that? We could use a sponge(海绵)，a towel or a mop.Which do you prefer？” He chose the sponge. His mother then said，“You know，what we have here is a __12__ experiment in how to effectively carry a big milk bottle with two __13__ hands.Let's go out in the back yard and fill the bottle with water and see if you can make it.” The little boy learned that if he __14__ the bottle at the top near the lip with both hands，he could carry it without dropping it.What a wonderful __15__！ This scientist then remarked that it was at that moment that he knew he didn't need to be __16__to make mistakes.Instead，he learned that mistakes were just __17__ for learning something new，which is，__18__，what scientific experiments are all about. Even if the experiment “doesn't__19__，” we usually learn something __20__ from it.
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