壮族人民哪一年开始创制并使用以拉丁字母书写的现代壮语文字？（）
A.1955
B.1949
C.1919
参考答案：A
四号定位方法约定用数字表示（）
A.料位
B.层号
C.库房
D.库区
Yao Ming as well as his teammates ______ hard to win honor for China these years.
A．work
B．are working
C．has been working
D．works
