起重机夜间作业时，作业场所要有足够的（）。
A.面积
B.措施
C.照明
D.设备
参考答案：C
— You don't look well. You'd better see the doctor.
— I ______. But the doctor said there was nothing serious. [ ]
A. have
B. am
C. will
D. was
苯巴比妥的乙醇溶液澄清度检查物质是（）
A．苯丙二酰脲
B．酸性杂质
C．2-苯基丁酰胺
D．对氨基酚
E．苯基丁酰脲
