成为中国公民的方式是（）。
A.在中国居住
B.在中国有住所
C.取得中国国籍
参考答案：C
________,I have never seen anyone who is as capable as David.[ ]
A．As I have traveled so much
B．As long as I have traveled much
C．Now that I have traveled much
D．Much as I have traveled
统计数据用户包括（）
A.政府机构
B.研究机构
C.国内公众
D.国外用户
E.新闻媒体
