Speaker A: ________Speaker B: It's Saturday.
A.What date is it today?
B.What's the date?
C.What day is it today?
D.What's day?
第4题
物质燃烧需要具备()基本条件。
A.可燃物、助燃物
B.可燃物、着火源
C.助燃物、着火源
D.可燃物、助燃物、着火源
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