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【单选题】
凯达尔定氮法的关键步骤是消化,为加速分解过程,缩短消化时间,常加入适量的( )。A.
无水碳酸钠
B.
无水碳酸钾
C.
无水硫酸钾
D.
草酸钾
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皮皮学刷刷变学霸
举一反三
【多选题】Which following are not the roles of a foreign languag tour guide?
A.
Navigating
B.
Interpreting
C.
Paying the bill
D.
Forcing tourists to shop
E.
Ensuring safety
【单选题】Which of the following statements is true in the author's opinion?
A.
Ability to use language enhances one's capacities.
B.
Word and thought match more often than not.
C.
Thinking never goes without language.
D.
Language and thought are generally distinguishable.
【简答题】The concept competence originally refers to the grammatical knowledge of the ideal language user and has nothing to do with the actual use of language in concrete situation.(南开大学2004研)
【简答题】If a child is deprived of linguistic environment, he or she is unlikely to learn a language successfully later on.
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