【简答题】用所给词的正确形式填空。 1. What's he doing now? He ________ (drink) pop. 2. Is Kim _________ (sing)? 3. My mother like __________ (watch) TV, but she __________ (not watch) now. 4. Please be ___________ (quietly...
【单选题】—What's she doing now? —She's _____. [ ]
【简答题】搭配句子,请把A组和B组的句子互相搭配起来。 A ( ) 1. What time is it now? ( ) 2. What's Jenny doing? ( ) 3. Who's this little girl? ( ) 4. Are you Li Ming? ( ) 5. What are you doing? B A. I'm writing a...
【简答题】自艾滋病被发现那天起,科学家就通过国际合作致力于研制让健康人免于感染的疫苗。2009年9月24日,美国和泰国研究人员共同研制出了具有免疫效果的艾滋病“联合疫苗”。这种“联合疫苗”是由两种疫苗组成,其中一种负责刺激免疫系统,使其做好攻击艾滋病病毒的准备;第二种则担当“助攻手”,负责增强免疫反应。下图为人体免疫的部分过程示意图,请回答: 科学家早已认识到,研制疫苗是抗击艾滋病最有效的良方。科学家研制的...
【单选题】— What's she doing now? — She's _____ in the sun and _____ an apple. [ ]
【简答题】请结合上下文将下列对话补充完整。 1. — What's he doing now? — He's __________________ football. 2. — When do you go to school? — I often __________________ to school at 7: 30. 3. — What's Lily doing now? — She is ____...
【单选题】特异性IgM水平升高有助于感染早期诊断的原因是
E.
IgM是免疫应答中最早产生的抗体,且半衰期较短.
【单选题】—What's your mother doing now? —She ______ supper in the kitchen. [ ]