检查空调专用电源开关时，用红外测温仪进行测量，要求开关表温度以不超过（）℃为正常。
A.60
B.70
C.80
D.90
参考答案：C
---Do you mind _____alone at home?
---No, but I want a good book_______. [ ]
A .leaving; to read
B. to be left; reading
C. to leave; reading
D. being left; to read
社会人
