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【单选题】
若偶函数f（x）在区间[-1，0]上是减函数，α、β是锐角三角形的两个内角，且α≠β，则下列不等式中正确的是（ ）A.
f（cosα）＞f（cosβ）
B.
f（sinα）＞f（cosβ）
C.
f（sinα）＞f（sinβ）
D.
f（cosα）＞f（sinβ）
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举一反三
【单选题】David Ricardo 's theory of comparative advantage holds that comparative advantage comes from ( ) .
A.
difference in labor productivity.
B.
difference in resource endowments
C.
difference in absolute costs
D.
difference in labor costs
【单选题】David Vaux holds that what Science is doing now
A.
adds to researchers’ workload.
B.
diminishes the role of reviewers.
C.
has room for further improvement.
D.
is to fail in the foreseeable future.
【多选题】关于空调系统损伤评估说法正确的是()。
A.
因为冷凝器安装在汽车散热器前方，所以当汽车正面碰撞时容易损坏
B.
如果在碰撞中，压缩机的电磁离合器和带轮总成损坏，可分别从压缩机上拆卸进行修理或更换
C.
空调系统泄漏可通过对空调受损部位喷涂肥皂水的方法检查
D.
若储液干燥器损坏，则应更换。
【单选题】David Beckham has ________ it takes to become a professional football player.
A.
who
B.
what
C.
which
D.
that
【单选题】Which of the following is true in the case of David Garrison ?
A.
He holds a guarded prospect of bridging the income gap in a short period.
B.
Current economic progress and recovery will be able to help out the poor.
C.
He argues that this income disparity originates from multiple factors.
D.
Rich families tend to move into the greater Washington metro area.
【简答题】David Vaux holds that what Science is doing now [A] adds to researchers’ workload. [B] diminishes the role of reviewers. [C] has room for further improvement. [D]is to fail in the foreseeable future 本...
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