皮皮学，免费搜题
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【单选题】
commentA.
vt. 区分，辨别
B.
n. /vt. 评论
C.
vt. 促使
D.
n. 能力，技能
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举一反三
【简答题】A．For the sake of their health. B．For the maintenance of the heating or the air-condition. C．To make best use of their resources. D．To make full use of the heating or the air-condition.
【单选题】We know from the last paragraph that______.
A.
people in the north are more obsessed with tidiness
B.
where there are less human beings, there are more birds
C.
cultural difference is not clear from south to north in England
D.
people in the south enjoy decorating their gardens with green plants
【单选题】. The top leaders of the two states are holding a meeting in a friendly _______.
A.
atmosphere
B.
condition
C.
position
D.
situation
【简答题】If the B/L states that the goods were shipped“ in apparent good order and condition” then any damage must have occurred（ ）．
【简答题】已知A=x 3 -2x 2 +1，B=-3x 3 -4x 2 +2． 求：3A-B．
【简答题】已知A=3x 2 +2x，B=x 2 ﹣3x+1，求A﹣3B．
【简答题】已知A=-x 3 +2x 2 -1，B=3x 3 +4x 2 -2，求2A-B。
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