【单选题】下列说法正确的是( )。
B.
如果作用在梁上所有外力都与梁轴线垂直,则该梁产生平面弯曲。
C.
纵向对称面是梁的轴线与各横截面纵向对称轴所构成的平面。
D.
平面弯曲是指梁的横截面变形前是平面,受力变弯后仍然为平面的弯曲。
【单选题】Structure of the passage Take charge and take personal responsibility for meeting its objectives, whatever they are.
【单选题】肺炎患儿出现心力衰竭时,不包含的症状是:
【判断题】平面弯曲是指梁的横截面变形前是平面,受力受弯后仍为平面的弯曲。 ( )
【单选题】Don’t just call a meeting and hope the magic happens. Take charge and take personal ____
A.
s objectives, whatever they are.
B.
responsibility for meeting
C.
responsible for meeting
D.
responsibility to meet
【简答题】Take charge and take personal responsibility for _________ its ______________(达成...目标) , whatever they are.
【单选题】A flights attendant would take charge of me and I never had an unpleasant .
【判断题】平面弯曲是指梁的横截面变形前是平面,受力变弯后仍为平面的弯曲