从上面介绍的国外水平看来虽然在某些方面我们是有差距的,但是一般说来差距并不很大,只要我们努力去做,可以在不长的时间里赶上去。根据七十年代的发展情况,对100米以上的大跨桥梁应尽先考虑预应力混凝土斜张桥,我国在这方面已有了良好的开端;对30米 It seems from the above description of the foreign standards that although we are in some ways there is a gap, but in general the gap is not large, as long as we strive to do, you can catch up in a short time. According to the development in the seventies, prestressed concrete diagonal bridge should be considered as a priority for long-span bridges over 100 meters. China has made a good start in this respect. For 30 meters