在梁底加梁垫是为了相对提高砌体的局部抗压强度。
参考答案：对
(2009·北京)At first he hated the new job but decided to give himself a few months to see ________ it got any better.
A．when
B．how
C．why
D．if
电客车救援作业过程中，推进运行时采用URM/NRM（非限制人工驾驶模式）模式驾驶，限速（）。
A.25km/h
B.30km/h
C.35km/h
D.45km/h
