单项选择题

下列化合物α-H的活性最差的是 A.
B.
C.
D.

你可能感兴趣的试题

单项选择题

Duringexploratory surgery of the abdomen,an incidental finding was a herniation ofbowel between the lateral edge of the rectus abdominis muscle,the inguinalligament and the inferior epigastric vessels.These boundaries defined thehernia as a (n):
A、 congenital inguinal hernia
B、directinguinal hernia
C、femoralhernia
D、indirectinguinal hernia
E、umbilicalhernia

单项选择题

电位滴定与容量滴定的根本区别在于（）不同。
A、滴定仪器
B、指示终点的方法
C、滴定手续
D、标准溶液