镰刀菌毒素包括（）
A、单端孢霉烯族化合物
B、玉米赤霉烯酮
C、丁烯酸内酯
D、黄曲霉毒素
E、环氯素
参考答案：A, B, C, E
Months ago we sailed ten thousand miles across this open sea, which _____ the Pacific, and we met
no storms. [ ]
A. was called
B. is called
C. had been called
D. has been called
将0.1 L含有0.02mol CuSO4和0.01mol NaCl的水溶液用惰性电极电解。电解一段时间后，一个电极上得到0.01 mol Cu，另一电极析出的气体
A．只有Cl2
B．只有O2
C．只有H2
D．既有Cl2又有O2
