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单项选择题
按结构形式划分,用6根刻痕钢丝和一根光圆中心钢丝捻制的钢绞线的代号为( )。
A.1×6
B.1×7
C.1×7I
D.(1×7)C
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The family ____ at a small hotel for the night.
A.putup
B.wentup
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This song is very ____ with young people.
A.pleasant
B.popular
C.favourite
D.beautiful
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