日本血吸虫感染人体后产生的免疫力可以杀伤再进入体内的()
A. 虫卵
B. 雌虫
C. 雄虫
D. 童虫
E. 以上均正确
丝虫对人体的感染阶段为:
A. 囊尾蚴
B. 囊蚴
C. 丝状蚴
D. 杆状蚴
E. 微丝蚴
They should be res____ for planning and carrying out the financial policies of the company.据首字母提示填空,填完整单词
No final decision has been ult____ taken, but it seems likely that the two companies could merge in the near future.据首字母提示填空,填完整单词