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【单选题】
和人体需要的模式相比,食物蛋白质中最感不足的必须氨基酸称为 ( )A.
必须氨基酸
B.
必需氨基酸
C.
半必须氨基酸
D.
限制性氨基酸
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举一反三
【单选题】The author's major conclusion about mistakes in foreign language learning is that
A.
mistakes are not important in the process of learning a language
B.
learners are often very afraid of making mistakes
C.
making mistakes can help the learner discover the roles
D.
native speakers often do not tell foreign language learners about their mistakes
【简答题】A．You must join a football team to learn a language. B．Language learning is somewhat like playing football. C．In order to learn a language well you must have lost of practice on all the skills. D．You ...
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