以下疾病中属于结缔组织病的是()
A．红斑狼疮
B．荨麻疹
C．多形性红斑
D．结节性红斑
参考答案：A
重大危险源的危险性分为( )个级别。
A．2
B．3
C．4
D．5
对话排序。
A. I guess I eat it two or three times a week.
B. Maybe twice a week. But I never eat fruit. I don't like it.
C. Yes, a little.
D. You're welcome.
E. How often do you eat it?
F. Do you like junk food?
G. OK, thank you for telling me.
H. What about vegetables and fruit?
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