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【单选题】
.淹溺救援时,错误的优先原则是
A.
工具优先
B.
水中优先
C.
信息优先
D.
团队优先
E.
岸上优先
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举一反三
【简答题】The barrier to democracy in 21st century America is ________. A) widespread use of racist stereotypes B) prejudice against minority groups C) deep-rooted socio-economic inequality D) denial of legal r...
【单选题】学期初同学们在家里选课,为保障安全,校园网采用了什么技术?
A.
Webvpn
B.
防火墙
C.
入侵检测系统
【判断题】两个非零向量a,b的向量积满足交换律,即 .
A.
正确
B.
错误
【简答题】In those days even bicycles were very dear and hard to ______, and coupons were issued for them.
【简答题】And even graves themselves soon ______back into the soil.
【单选题】Some people say that if the holder of chopsticks pushes them______ his stomach to even them up instead of tapping them on the table, the chances are he is a coolie.
A.
on
B.
against
C.
at
D.
to
【单选题】Every minute is made full _____ of _____ our lessons well.
A.
to use; study
B.
use; studying
C.
use; to study
D.
used; studying
【单选题】Much to her delight, three _________ neighbors showed up and several of them even brought with them some candies and cookies.
A.
dozens
B.
dozen
C.
dozen of
D.
dozens of
【简答题】In those days even bicycles were very dear and hard to ______, and coupons were issued for them.
【单选题】如图所示,质量为m的物体用平行于斜面的细线连接置于光滑的斜面上,若斜面向右方作加速运动,当物体刚脱离斜面时,它的加速度的大小为( )
A.
;
B.
;
C.
;
D.
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