郑和下西洋，最远到达了哪里？（）
A.印度半岛
B.西印度群岛
C.非洲东岸
D.地中海西岸
参考答案：C
当通信电线路两端阻抗不匹配时会出现什么现象？
She is not particular _____ clothes as long as they are comfortable to wear. [ ]
A. about
B. from
C. of
D. in
