If you _____ that something bad, unpleasant or embarrassing is true, you agree that it's true.

实验室用稀硫酸除去一定质量的铜粉中混有的铁粉，共消耗稀硫酸50g，生成0.2g氢气．计算稀硫酸中溶质的质量分数．

根据对话内容，从对话后的选项中选出能填入空白处的最佳选项，并将答案标号填写在本题下面相应题号后的横线上。选项中有两项多余选项。
—Now, tell me about the man who stole your neighbor’s car. What did he look like?
—Well, sir. He was tall…
— ____ 
—Oh yes, and he was younger than you — only about thirty, I’d say.
—Well! And what color was his hair?
—It was brown, and short… it was similar to yours, actually.
— ____ 
—No, He was clean-shaven.
—OK. Now have a look at these photos — can you see him?
— ____ 
—But that’s Frankie Famham — he’s got a beard, and he’s very short!
—Hm, well…
— ____ 
—Yes, the strangest thing was that he appeared to be a gentleman — he was wearing a suit… not like a thief at all.
—Hm, like this photo?
—Yes, that’s him!
—That’s Bill Mahony: he’s in prison! Are you sure you saw the thief?
— ____ 

温暖

    一天，雷锋同班战友小韩出车回来很晚，他的棉裤被汽车电瓶里的硫酸烧了一个洞，由于又累又困，也没在意，钻进被窝里就睡了。

    雷锋夜间值班回来，像往常一样，到各个铺位巡视一遍。他看见有的同志蹬开了被子，露出了腿脚，便轻轻地给他盖好。忽然他发现小韩棉裤上的那个破洞，心想：天这么冷，明天可不能让小韩穿着这样的棉裤出差、出车。他便拿起小韩的棉裤想给他补一补，可是一时又找不到合适的布。他琢磨了一会儿，忽然想到自己帽子里的衬布很合适，便拆了下来，聚精会神地一针一线地把小韩的棉裤补好了，然后轻轻地盖在小韩身上。

    雷锋同志就是这样关心着班里的每个战士，对同志像春天般的温暖。