血液寄生并需要中间寄主的是（）
A.鲩内变形虫
B.中华六鞭毛虫
C.鳃隐鞭虫
D.锥体虫
参考答案：D
John knows so much about stars that I am sure it would be impossible to find someone who is ___ to him.
A．similar
B．same
C．equal
D．polite
有较强的亲脂性、易通过血脑屏障、并适用于脑肿瘤治疗的药物是
A．美法仑B．塞替派C．顺铂D．环磷酰胺E．卡莫司汀
