龙门桩
参考答案:在建筑物四角和中间隔墙的两端基槽之外1~2m处,竖直钉设的木桩。
His experiences as a volunteer in the quake-hit areas have changed his attitude toward society and _______ influence his future life.
A.is to
B.was going to
C.are to
D.were sure to
径向流的叶轮称为离心泵,液体质点在叶轮中流动时主要受到的是()的作用。