皮皮学，免费搜题
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【单选题】
胃液中初步消化蛋白质的是A.
胃酸
B.
胃蛋白酶
C.
粘液
D.
内因子
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【单选题】Most dictionaries will tell you a number of【21】about a language. There are three things in particular that【22】important. These three things are spelling, pronunciation, and meanings. The first and mos...
A.
books
B.
people
C.
things
D.
thing
【单选题】Directions: After reading the following passage, you will find a question or unfinished statement. For each question or statement there are 4 choices marked A, B, C and D. You should make the correct ...
A.
the importance of key employees
B.
how to challenge your employees
C.
how to keep your employees
D.
the difference between “push” and “pull”
【单选题】Why can' t we provide as many houses as needed?
A.
Because we cannot make the choice.
B.
Because we do not have enough resources.
C.
Because we do not have a free housing market.
D.
Because education is more important than housing.
【单选题】In the present economic ______ we cannot make even greater progress than previously.
A.
air
B.
area
C.
climate
D.
mood
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