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【简答题】
沪科版九年级下册化学课堂练习册第七单元练习三课时1溶质质量分数的基本计算
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举一反三
【简答题】Heat causes the (expand) of gases.
【单选题】— How long do you want me to heat the oil? — Heat it till it _____ to smoke. [ ]
A.
would begin
B.
begins
C.
will begin
D.
began
【简答题】Metals expand with heat and contract with cold. contract:
【单选题】The ideal piston material would not ______. light and strong, conduct heat well, expand only slight when heated, resist wear, and be low in cost.
A.
be light and strong
B.
conduct heat well
C.
expand only slight when heated
D.
be high in cost
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