《国际旅客联运协定》规定,册页票本由协定规定的用手工或电子方法办理的()组成。
A.联运票据
B.票皮和乘车票据
C.客票和卧铺票
D.票皮和附加票
参考答案:B
The experiment shows that proper amounts of exercise. if ____ regularly. can improve our health. [ ]
A. being carried out
B. carried out
C. carrying out
D. to carry out
中国除了汉族有自己的历法外,还有()民族有自己的历法