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【单选题】
汽车空调正常工作时,蒸发器流动的制冷剂是___的。A.
高压低温液态
B.
低压低温气态
C.
高压高温气态
D.
高压中温液态
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举一反三
【简答题】设函数f(x)和φ(x)在[a，b]上连续．证明 这里x i ≤ξ i ≤x i+1 ，x i ≤θ i ≤x i+1 (i=0，1，…，n-1)
【单选题】在现金流量表的构成要素中，经营成本的计算公式是（ ）。
A.
经营成本=总成本费用-折旧费
B.
经营成本=总成本费用-折旧费-摊销费
C.
经营成本=总成本费用-折旧费-摊销费-利息支出
D.
经营成本=总成本费用-折旧费-摊销费-利息支出-修理费
【单选题】I agree to his suggestion __________ condition that he drops all charges.
A.
by
B.
in
C.
on
D.
to
【单选题】. I agree to his suggestion__________the condition that he drops all charges.
A.
by
B.
in
C.
on
D.
to
【简答题】对移动电子商务这门课你是如何理解和看待的?你认为它对你的作用和帮助会有哪些?(不低于200字)
【单选题】Her answer is different from _____,but I really agree with_____.
A.
his,her
B.
hers,hers
C.
his,hers
D.
him, hers
【简答题】求f(x 1 ，…，x n )=x 1 x 2 …x n 在条件 (a i ＞0，i=1，2，…，n，a＞0)之下的极值。并证明当a i ＞0(i=1，…，n)时，成立 取Lagrange函数为 由
【单选题】If I______them, I would not agree with any of his suggestions.
A.
am
B.
was
C.
were
D.
had been
【单选题】—Tom doesn't speak English ______ his classmates. —I agree with you. But his written work is wonderful. [ ]
A.
as often as
B.
as many as
C.
as good as
D.
as well as
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