Afraid that he might get his hands________, the monkey had the cat _______chestnuts out of the fire.

A．burnt, picked

B．burn, pick

C．burn, picked

D．burnt, pick

在含酚酞的0.1 mol/L氨水中加入少量NH₄Cl晶体，则溶液颜色 （         ）

A．变蓝色

B．变深

C．变浅

D．不变