以下不出现在粪便中的寄生虫体是
A．钩虫B．蛔虫C．绦虫节片D．蛲虫E．血吸虫
参考答案：E
—I like your new leather boots!
—Thanks．I had to try on almost a dozen pairs ______ I decided to get them．
A．as
B．when
C．after
D．before
矿石选冶试验的目的是什么？
