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【单选题】
下列关于人体内蛋白质的叙述,正确的是A.
蛋白质具有多样性,是由于氨基酸的种类、数目、排列顺序和空间结构不同
B.
指导蛋白质合成的基因中的碱基有C、G、A、T、U
C.
人体内的酶都是蛋白质,激素不一定是蛋白质
D.
蛋白酶也是蛋白质,能够把蛋白质分解为氨基酸
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【单选题】Every means ___ the river from being polluted.
A.
are used to prevent
B.
are used to preventing
C.
is used to prevent
D.
is used to preventing
【单选题】Now those foreigners _____ Chinese food. [ ]
A.
used to eat
B.
are used to eating
C.
are used to eat
D.
get used to eat
【单选题】Computers_______ many things and we_______ these modern machines.
A.
are used to doing; are used to use
B.
are used to do; are used to using
C.
used to do; are used to using
D.
are used to do; used to use
【单选题】As we all know plastics _ many things. [ ]
A.
used to making
B.
used to make
C.
are used to making
D.
are used to make
【单选题】---- John, you look worried. Anything wrong? ---- Well, I _______ a test and I’m waiting for the result.
A.
will take
B.
took
C.
had taken
D.
take
【单选题】The telephone ( ) connect you to the absent.
A.
used to
B.
using to
C.
are used
D.
are used to
【单选题】听力原文： American women are used to being independent. They are used to going places by themselves, earning their own money, and often living alone. Sometimes they will ask men for help, but they usually...
A.
They are used to earning their own money.
B.
They often live alone.
C.
They don't start conversation with men.
D.
They may ask men for dance.
【单选题】The stones ______ houses and bridges.
A.
are used to build
B.
used to build
C.
are used to building
D.
used to building
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