下列哪一药物肝脏毒性最明显（）
A.恩氟烷
B.氟烷
C.异氟烷
D.七氟烷
E.地氟烷
参考答案：B
Facing starvation as a result of drought, they had no ________ but to eat the roots of the trees. [ ]
A. concern
B. command
C. shortcoming
D. alternative
卫氏并殖吸虫临床表现特征为（）
A.咳烂桃肉样痰
B.高热、寒战
C.游走性皮下包块
D.全身出现荨麻疹
E.脑脓肿
