目前我国线路直线地段采用的标准轨底坡为()。
A.1:40
B.1:50
C.1:60
D.1:70
参考答案:A
All things ___, the planned trip will have to be called off.
A.considered
B.be considered
C.considering
D.hating considered
含水量测试中,对有机质土应采用()温度。