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【多选题】
下列n（n > 2）阶行列式的值必为零的是（ ）A．行列式中非零元素的个数小于n； B．行列式中有一半的元素等于零；C．行列式主对角线上的元素； D．行列式的元素中每个数都重复出现n次．A.
行列式中非零元素的个数小于 n
B.
行列式中有一半的元素等于零
C.
行列式主对角线上的元素
D.
行列式的元素中每个数都重复出现 n 次
E.
行列式中非零元素的个数小于 n
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举一反三
【单选题】The word ( ) means 'the right to exclude others from making, using, or selling an invention or products made by an invented process that is granted to an inventor and his or her heirs or assigns for a...
A.
consent
B.
capacity
C.
statute
D.
patent
【单选题】get sth., esp. an advantage or a pleasant feeling, from sth. 得到,获得(优势或愉快的感受)
A.
take stock of
B.
consult with sb.
C.
on track
D.
derive sth. from sth.
【单选题】exclude与preclude The bad weather ( ) me from attending the meeting.
A.
precluded
B.
preclud
C.
exclude
D.
excluded
【单选题】shrink away [from sth./sb.]
A.
move away [from sth./sb. unpleasant]
B.
laugh [at sth./sb.]
C.
pity [sth./sb.]
D.
contract [sth.]
【单选题】现代电子控制喷射柴油机的优点有：（）。 Ⅰ.振动轻 Ⅱ.最低稳定转速低 Ⅲ.油耗率低 Ⅳ.排放低 Ⅴ.加速性好 Ⅵ.机械负荷、热负荷小
A.
Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ、Ⅵ
B.
Ⅲ、Ⅳ、Ⅴ、Ⅵ
C.
Ⅰ、Ⅲ、Ⅳ
D.
Ⅱ、Ⅲ、Ⅳ、Ⅴ
【单选题】A person can exclude or restrict his liability for personal injury resulting from negligence by express consent.
A.
正确
B.
错误
【单选题】We have just installed a fan to _____ cooking smalls from the kitchen. eject exclude expel exile
A.
eject
B.
exclude
C.
expel
D.
exile
【单选题】shrink away [from sth./sb.]
A.
pity [sth./sb.]
B.
move away [from sth./sb. unpleasant]
C.
laugh [at sth./sb.]
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