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【单选题】
凝集反应的特点是A.
颗粒性抗原与可溶性抗原均可直接参与凝集反应
B.
IgM类抗体的作用强度比IgG类抗体要大
C.
IgG类抗体的作用强度比IgM类抗体要大
D.
反应时间一般为数小时至数天
E.
常用于定量检测
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【单选题】What is the trend in the English language that this book emphasizes?
A.
The English language is becoming assimilated with other languages.
B.
Differences between languages are more and more obvious.
C.
The English language is always absorbing words from other languages and turning them into its own.
D.
The English language is gradually losing its linguistic vitality.
【单选题】A Debate on the English Language A measure declaring English the national language is under intense debate in the United States.The US Senate passed two declarations last week.One calls English the na...
A.
The status of the English language.
B.
The protection of new languages.
C.
The rights to speak one’s mother tongue.
D.
The improvement of the English language.
【简答题】特种铸造,按造型材料又可分为以 为主要造型材料的特种铸造(如熔模铸造)和以金属为主要铸型材料的特种铸造(如金属型铸造、压力铸造)两类。
【简答题】铸造方法从总体上可分为普通铸造和特种铸造两大类，普通铸造是指砂型铸造方法，不同于砂型铸造的其他铸造方法统称为特种铸造，常用的特种铸造方法有：（）、（）、（）、（）、等。
【简答题】If English is not your first language, it is a good idea to take English language classes to improve your written and spoken communication skills. There are many ways to learn English. You can learn f...
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