問題詳情
5.tWhich of tiie following statements of lenses is true?
(A)tNearsighted glasses use concave lenses.
(B)tFarsighted glasses use concave lenses.
(C)tSimple magniiying glass uses concave lenses.
(D)tAil of the above.
(E)tNone of the above.
參考答案
答案：A
統計：A:1,B:0,C:0,D:0,E:0
難度：計算中