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【单选题】
所谓乙炔瓶内的炔酮比即（）。A.
乙炔与丙酮的体积比
B.
单位丙酮质量（Kg）所充装乙炔的质量（Kg）
C.
乙炔在丙酮中20℃，0.2MPa的溶解度
D.
乙炔在丙酮中40℃，0.4MPa的溶解度
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【简答题】Aquel de
chaqueta negra es _______.A. secretario B. Antonio C. empresario
【单选题】Parents _________ much importance to education. They will do their best to give their children that priceless gift.
A.
pay
B.
apply
C.
attach
D.
associate
【单选题】Parents ____ much importance to education They will do their best to give their children that priceless gift. [ ]
A.
attach
B.
pay
C.
link
D.
apply
【简答题】quince, chaqueta,azul
【单选题】Parents ______importance to education. They will do their best to give their children that priceless gift.
A.
attach
B.
pay
C.
link
D.
apply
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