问题
单项选择题
在《化学品安全标签编写规定》（GB15258-1999）中，根据化学品的危险程度和类别，用＿分别进行危害程度的警示。
A.警告、小L"、注意
B.危险、警告、注意
C.红色、黄色、蓝色
D.红色、黄色、白色
答案
参考答案：B
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在《化学品安全标签编写规定》（GB15258-1999）中，根据化学品的危险程度和类别，用＿分别进行危害程度的警示。
A.警告、小L"、注意
B.危险、警告、注意
C.红色、黄色、蓝色
D.红色、黄色、白色
参考答案：B
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| As students we should learn to help others. There is a special 1 for us to help others at our school. Last year we went to an old man's 2 , and we sangsongs, danced and didhousework for 3 . The old people were very 4 . And on that day we felt very excited 5 we can try our best to do good things forpeople. I think we should do things like thatmore often. For example, we should 6 primary schools and help the teachers 7 young students .I want to be a 8 when I'molder, so it would be a great experience for me. 9 students would like to do other jobs. Forexample, my friend Liu Lei wants to 10 for a newspaper. She usually goes to the newspaperoffice once a week.  | ||||
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