题目:
设P和Q是两个集合,定义集合P-Q={x|x∈P且x∉Q},如果P={x|log2x<1},Q={x||x-2|<1},那么P-Q=( )
A.(0,1)
B.(0,1]
C.[1,2)
D.[2,3)
答案:
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1. How long, collect 2. had to 3. describe what the students did during their holidays 4. the students' 5. have not written anything / haven't written any word