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【单选题】
（ ）是指为改善车辆的技术性能或延长车辆使用寿命，改变原车辆零部件或总成的工作。A.
车辆技术改造
B.
车辆大修
C.
车辆小修
D.
车辆改装
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举一反三
【单选题】What can we learn about Fredy?
A.
He helps those who will work hard themselves.
B.
He likes to give his help to anyone in need.
C.
He always gives help to the unemployed.
D.
He is easily moved by poor people.
【单选题】I it to you as soon so I your money.
A.
will post; will receive
B.
am going to post; will receive
C.
will post; receive
D.
post; receive
【单选题】According to the passage, the author likes being with those______.
A.
fat people who are clumsy and slow in movement and gets fed up with those quick and sensitive thin people
B.
thin people who are always energetic and active and those fat people, too, who are steady in the moves they take
C.
fat people who are inactive and easily get jaded but hates to be among those thin people who are active and energetic
D.
thin people who get rid of things quickly but feels sick of those fat people who are all thumbs
【单选题】I it to you as soon as I your money.
A.
will post; will receive
B.
am going to post; will receive
C.
will post; receive
D.
post; receive
【单选题】He likes helping others, ______ those who are in trouble.
A.
in theory
B.
in particular
C.
in favor
D.
in practice
【简答题】计算Cu 2+ 浓度为0.010mol·L -1 的溶液，(1)Cu(OH) 2 开始沉淀时的pH；(2)Cu 2+ 沉淀完全，即c(Cu 2+ )≤10 -5 mol·L -1 时溶液的pH。
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