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【单选题】
According to the passage, ______ causes the most serious problem.A.
pollution
B.
noise
C.
population
D.
traffic jam
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举一反三
【单选题】The librarian told me that I could _____ these magazines for three days.
A.
borrow
B.
keep
C.
return
【简答题】进程的基本特征有 、 、独立性、异步性。
【简答题】设某企业的利润函数为 ,求使利润最大的产量q.
【简答题】进程的基本特征有 、 、独立性、异步性及结构特征。
【单选题】The librarian ________ told Mary where to find the books she wanted.
A.
hopelessly
B.
helpfully
C.
helpful
【单选题】The librarian told me that I could ______ these magazines for three days.
A.
borrow
B.
buy
C.
keep
D.
return
【单选题】The librarian told me that the book______for two weeks.
A.
can be borrowed
B.
can be kept
C.
could be borrowed
D.
could be kept
【单选题】The librarian told the readers _________ loudly in the library.
A.
to talk
B.
not to talk
C.
talk
D.
talking
【简答题】进程的基本特征有 、 、独立性、异步性和结构特征。
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