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【单选题】
杆件轴向拉伸和压缩受力特点是（ ）。A.
所受外力垂直杆件轴线
B.
所受外力沿杆件轴线方向
C.
所受外力与杆件轴线方向夹45°角
D.
所受外力与杆件轴线方向夹30°角
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举一反三
【单选题】It ______ me to admit that I was such a fool as to repeat the same mistake again and again.
A.
paints
B.
plans
C.
pains
D.
complains
【单选题】It __________ me to admit that I was such a fool as to repeat the mistake.
A.
informed
B.
pained
C.
shirnked
D.
overheared
【简答题】It ____me to admit that I was such a fool as to repeat the mistake.
【多选题】It ______ me to admit that I was such a fool as to repeat the mistake.
A.
pained
B.
pains
【单选题】It ____ me to admit that I was such a fool as to repeat the mistake.
A.
pained
B.
paid
C.
put
D.
felt
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