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【单选题】
Mary cares about clothes too much, and she _____ too much money _____ clothes. [ ]A.
spend; in
B.
cost; at
C.
pays; to
D.
spends; on
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举一反三
【单选题】A beneficial book is like a faithful friend who plays an important role in your life.
A.
negotiating
B.
brings in
C.
argument
D.
eateries
E.
pitched in
F.
offer to do
G.
How about going?
H.
owes..... to
I.
loyal
J.
involve
【简答题】Jennifer seems to believethat [A]the extinction of Y chromosome isinevitable． [B]Page’s research is more beautiful thanhers． [C]the“imminent demise”theory is nonsense． [D]whether Y chromosome will dis...
【简答题】给出下列线性规划的最优单纯形表，如表2．4．1所示。其中，s1，s2分别为第1、第2约束方程中的松驰变量。 max z＝6x1＋2x2＋12x3 (1)求出最优基不变的b2的变化范围； (2)求出最优解不变的c3的变化范围； (3)在原线性规划的约束条件下，增加约束条件：x1＋2x2＋2x3≤12。其最优解是否变化?如变化，求出最优解。
【简答题】A book is like a garden carried in the pocket.
【单选题】The author's attitude towards the Y chromosome issue seems to be
A.
optimistic.
B.
confusing.
C.
panicked.
D.
objective.
【简答题】The author’s attitudetowards the Y chromosome issue seems to be [A]optimistic． [B]confusing． [C]panicked． [D]objective．
【单选题】Jennifer seems to believe that
A.
the extinction of Y chromosome is inevitable.
B.
Page's research is more beautiful than hers.
C.
the 'imminent demise' theory is nonsense.
D.
whether Y chromosome will disappear is uncertain.
【单选题】A good book is like a good friend. You cannot keep it long.
A.
very
B.
so
C.
too
D.
such
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