A-A+
In paragraph two his purpose refers to____
问题详情
In paragraph two, "this purpose" refers to______.
A．exchanging messages with ships at sea
B．communication across oceans
C．sending and receiving the picture
D．instant communication with moving vehicles请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：A
解析：注意本处代词this的特殊含义，一般指前面出现的内容。而4个选择项中只有A的说法出现在上句：Exchanging messages with ships at sea was one of the first uses of radio．Modern radio is still used for this purpose and for communication across oceans．
