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【多选题】
任何物质发生燃烧必须具备的三个条件是（）。A.
可燃物
B.
还原剂
C.
着火源
D.
催化剂
E.
助燃物
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反馈参考答案：
举一反三
【单选题】________ Switzerland is very small, ________ it is the land of watch and it is very rich.
A.
Because; so
B.
Because; /
C.
Though; /
D.
Though; but
【单选题】The island of Ta’u in American Samoa, small in size though, is large when it comes to renewable energy. It producing 100% of its electricity from _____
A.
ocean power
B.
solar power
C.
wind power
D.
hydropower
【简答题】1 Launched in 2010, AliExpress.com is an online retail service made up of mostly small Chinese businesses offering products to international online buyers. 2 AliExpress is the most visited e-commerce ...
【单选题】The island of Ta’u in American Samoa, small in size though, is large when it comes to renewable energy. It producing 100% of its electricity from solar power. The batteries store energy for up to ____...
A.
three hundred
B.
thirty
C.
three
D.
one
【单选题】Though Japan is a small country, it provides the world market with (various) products. 选择能代替括号里的选项
A.
separating
B.
variable
C.
diverse
D.
valueless
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