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【单选题】
根据食物进入消化道的先后,胰液分泌的时期顺序正确的是:A.
胃期,头期,肠期
B.
肠期,头期,胃期
C.
头期,胃期,肠期
D.
肠期,胃期,头期
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举一反三
【单选题】We were _____ to hear of the death of your mother.
A.
crazy
B.
worried
C.
surprised
D.
sad
【单选题】The peace treaty was signed. Before long they _____ again.
A.
fought
B.
fight
C.
were fighting
D.
have fought
【单选题】We hear that your firm ______ Chinese leatherproducts.
A.
buy
B.
sell
C.
take
D.
is in the market for
【判断题】The peace treaty was signed in 1776, in which the independence, freedom and sovereignty of the 13 states were acknowledged.()
A.
正确
B.
错误
【单选题】-- Mr Jordan, we want to hear your opinion about the current NBA games． -- OK, I ____ to that.
A.
came
B.
have come
C.
am coming
D.
come
【简答题】在元组关系演算中，投影操作需要在谓词公式中满足条件的元组前加（ ）量词符号。
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