氨吸收制冷装置中，氨精馏塔是由发生器、精馏段、回流冷却器三部分组成，为简化设备，在工程设计中一般把这三部分组合在一起。但有些情况下为了强化加热部分或为了检修方便，（）也可做成单独设备。

A.回流冷却器

B.精馏段

C.发生器

D.提馏段

There are ______ in my school as in your school. [ ]

A. as four times many students

B. four times students as many

C. four times many students as

D. four times as many students