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【单选题】
冲击试验的目的是测定焊接接头和焊缝金属的在受冲击载荷时( )的能力。A.
抗弯曲
B.
抗折断
C.
抗碰撞
D.
抗疲劳
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【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】下列关于母乳喂养的方法中,不正确的是
A.
母亲一般采用坐位
B.
吸空一侧乳房再吸另一侧
C.
先换婴儿尿布，再洗母亲双手和乳房
D.
将乳头放入婴儿口中吸吮
E.
哺乳完毕将小儿竖抱轻拍其背
【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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