发表《敬告青年》提倡民主和科学，从而揭开新文化运动序幕的是
答案：A
— Who can help me?
— I can help you ____________ it. [ ]
A. to carrying
B. carries
C. to carry
桨叶绕轴向铰转动，称桨叶（）.
A.摆振
B.挥舞
C.变距
