Follow the tape and read the following text aloud until you are familiar with it,Then record the text you read. 提示:跟读课文录音带,完成下面课文内容的朗读,读熟后完成录音提交。提交时注明第几单元第几段 班级 姓名。 P10 Reinforced concrete Reinforced concrete has steel bars that are placed in the concrete to carry tensile forces. These steel bars, which range in diameter from 0.2 inch to 2.25 inches, have wrinkles on the suces to ensure a bond with the concrete. Reinforced concrete can be molded into innumerable shapes, such as beams, columns, slabs and arches, and is therefore easily adapted to any particular form of building.