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【单选题】
合股加捻工序中,以下说法错误的是( )。A.
捻幅是指单位长度纱线加捻时，其纱线横截面上任意一点在该面上相对转动的弧长
B.
纱线横截面中，外层纤维捻幅最大
C.
捻心是指纱线横截面上综合捻幅为零的点
D.
双股线反向加捻能使内外层纤维捻幅差异增大
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举一反三
【单选题】Doing physical exercise _______ the risk of heart disease.
A.
lessens
B.
increases
C.
brings
D.
changes
【简答题】Why do human beings still risk their lives under ground and doing one of the dirtiest and most erous jobs in the world? It is an increasingly urgent question, given the recent mining accidents in ...
【简答题】risk_____(to do/doing)
【简答题】Doing nothing does not eliminate risk.
【单选题】What will Bob mostly be doing on his trip to St. Lucia?
A.
Reading and scuba diving.
B.
Scuba diving and motocycling with Gloria.
C.
Accompanying Gloria on shopping and dancing.
D.
Doing whatever pleases Gloria.
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