我国四大高原中，呈“地面平坦、一望无垠”景观特征的是  [ ]

A．内蒙古高原    

B．黄土高原    

C．云贵高原      

D．青藏高原

I think the Chinese are ______ than the Japanese. [ ]

A. friendlier

B. more friendly

C. friendlyer

D. more friendlier