A：16
B：32
C：64
D：96
Each of us has _________ life goals, which will guide us to a bright future. Without life goals, we may waste our lifetime.
Our school library has floors, and the reading room is on the floor.
明清时期商品经济空前发展。当时全国性的商贸城市是（ ）
关于电热的下列几个说法，错误的是
