一套西服原价210元，打九折后降价____元。

用所给词的适当形式填空
（1）I’d like to visit Beijing because the people there are very ____  (friend).
（2）The oranges come from ____ (south) China.
（3）What other____  (language) do you like? 
（4）There ____  (be) lots of meat in the ice box.
（5）How many ____  (box) of apples would you like? 

人的体细胞中染色体是精子中染色体的（   ）