疟疾发作具有周期性,其间歇期长短取决于()A.机体免疫力强弱 B.疟原虫毒力强弱 C 发布时间:2017-06-24 11:45 │ 来源:www.tikuol.com 题型:单项选择题 问题: 疟疾发作具有周期性,其间歇期长短取决于()A.机体免疫力强弱B.疟原虫毒力强弱C.裂殖体在红细胞内发育时间D.子孢子在肝细胞内发育时间E.侵入的子孢子数量
题型:单项选择题 They promised to develop a software package by the end of this year, ________ they might have.A.however difficultB.how difficultC.whatever difficultyD.what difficulty 查看答案