— Mom, I was the first to reach the top of the mountain.

— Good job, Charlie. I’m ______ of you.

A．tired

B．proud

C．sure

D．sick

火焰光度检测器是根据硫、磷等化合物在（）火焰中燃烧时，发射出波长分别为394nm和526nm特征光的原理而制成的。

A、氢

B、富氢

C、氧

D、富氧