下列哪几项是地龙所具有的药理作用
A．镇静
B．抗惊厥
C．解热
D．平喘
E．降血压
参考答案：A,B,C,D,E
The boy attached a rope ______ his sled. [ ]
A. at
B. to
C. in
D. with
钢筋弯折后，为什么会有延伸率？
