问题
单项选择题
中毒可引起严重的剥脱性皮炎。（）.
A.四氯化碳
B.三氯乙烯
C.二氯甲烷
D.二硫化碳
答案
参考答案：B
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中毒可引起严重的剥脱性皮炎。（）.
A.四氯化碳
B.三氯乙烯
C.二氯甲烷
D.二硫化碳
参考答案：B
Last week after a long day of traveling, I found myself delayed at a bus station. The bus was running two hours late! I was a little ____ and had to wait there reading a book. Just then a woman _____ and asked me if I had any spare change to help her ____ a bus ticket. “Oh, sure,” I said. With the words, I reached into my bag for some _____. As I handed her five dollars I _____her stomach rumble (发出辘辘声) and I knew she was very ______. I then reached back into my _____ and brought out a Danish pastry (酥皮糕点) I had bought earlier and _____it to her with a smile. She took the pastry and gave me a bus ticket to Milwaukee to show her _____. I don’t live in Milwaukee and the ticket will probably ____ be used, but I took it. A look of ____ spread over her face. Then she went to get her ____ and I went back to my ____. She came back a few ____ later, apologized, and told me there were five dollars ____. I gave her the money and slipped(悄悄地塞) a twenty ____. She thanked me and went back to the counter. ____ I went back to my book. Five minutes later she came back again and ____ to return my twenty. ____ I said it was for her so she could get something else to eat and that I wasn’t taking it back, she _____crying and hugged me. From then on, I always help others in trouble, because I believe I am really making a difference to them!
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