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【单选题】
It is often the case that popular music stars ______ at the young age.A.
rise to fame
B.
become to fame
C.
rise famous
D.
arise to fame
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【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 _____. [ ]
A.
go boating
B.
going to boating
C.
going boat
D.
going boating
【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. [ ]
A.
lying; eating
B.
lying; eat
C.
lie; eating
D.
lie; eat
【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
A.
IgM比其他类型lg容易测定
B.
lgM在免疫防御中具有重要作用
C.
lgM半衰期较短,激活补体能力最强
D.
IgM是个体发育过程中最早合成的lg
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. [ ]
A.
cooks
B.
cooked
C.
has cooked
D.
is cooking
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