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【单选题】
设矩阵 均为 阶矩阵,若 ,则 可逆,则( )A.
矩阵 的行向量组与矩阵 的行向量组等价
B.
矩阵 的列向量组与矩阵 的列向量组等价
C.
矩阵 的行向量组与矩阵 的行向量组等价
D.
矩阵 的行向量组与矩阵 的列向量组等价
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举一反三
【单选题】Your mother is coming. What present_______for your birthday?A．you think she has gotB．you think she
A.
7.Your mother is coming. What present_______for your birthday? A．you think she has got
B.
you think she has got
C.
do you think she has got
D.
do you think has she got
【多选题】关于托尔斯泰的作品的弊病，下列说法正确的（）
A.
托尔斯泰作品中的那些说教，不仅减弱了作品的艺术魅力，而且扭曲了生活
B.
尽管存在不少的弊病，托尔斯泰的《战争与和平》仍是欧洲最优秀的长篇小说之一
C.
在《战争与和平》和〈复活〉里，作者长篇累牍的议论关于道德的自我完善的议论，关于勿以暴力抗恶的议论都曾给作品带来一定程度的损害
【单选题】Experts predict that the earthquake and tsunami will _________ among the costliest natural disasters on record.
A.
clarify
B.
group
C.
separate
D.
rank
【单选题】关于托尔斯泰，下列说法中不正确的是：
A.
其心理描写的特点被概括为“心灵辩证法”。
B.
他被誉为俄罗斯的良心。
C.
他晚年思想转变之后所创作的最重要作品是《安娜·卡列尼娜》。
D.
他主张“爱一切人”，“勿以暴力抗恶”，主张通过道德自我完善来改造人和人类。
【单选题】Prices ______ , in response to harvests, natural disasters and political instability; and when they rise, it takes some time before new sources of supply become available.
A.
vibrate
B.
fluctuate
C.
flutter
D.
swing
【单选题】What do you __________ the transportation in your city? [ ]
A.
think up
B.
think out
C.
think of
D.
think over
【单选题】One of the _ of our planet's being warming up is an increase in the number of natural disasters. [ ]
A.
reasons
B.
causes
C.
result s
D.
consequences
【单选题】The passage is mainly talking about______.
A.
how to limit the damage that natural disasters cause
B.
the impact of natural disasters on economy
C.
the advances made by the government in doing relief work
D.
the disadvantages of urbanization and global integration
【单选题】下列有关《大萝卜》的说法，其中表述不正确的是（）
A.
这篇童话的作者是著名俄国作家列夫·托尔斯泰
B.
这是一篇超越时代和地域，受到世界各国一代又一代小朋友欢迎的童话
C.
这篇童话有着浓重的游戏性，动作性极强，适合于幼儿游戏表演
D.
这篇童话揭示了“团结就是力量”的道理。
【单选题】Have you ever wondered _____ there are so many natural disasters across the world in 2010? [ ]
A.
which it is that
B.
what is it that
C.
how it is that
D.
why it is that
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