神曲用治食滞脘腹胀满、食少纳呆、肠鸣腹泻.是取其什么功效（）
A.健脾开胃
B.行气止痛
C.清热燥湿
D.化痰除痞
E.和中止泻
参考答案：A, E
21. He apologized ________ late.
A．to his teacher to arrive
B．to his teacher for arriving
C．at his teacher to arrive
D．at his teacher for arriving
绑扎高度超过4m的圈梁、挑檐钢筋时，必须搭设______，不得站在______进行操作。
