简述扶壁式挡土墙的特点。
参考答案:
由墙面板、墙趾板、墙踵板和扶壁组成;墙可做很高,下部弯矩大,采用钢筋混凝土。
He was in poor health, so the doctor _____ him to drink wine.
A.hoped
B.demanded
C.forbade
D.prevented
芽接应注意的几个问题是什么?