【单选题】PF-5.0-WA-Y中WA的意思是()。
【单选题】CBR试验,泡水后试件吸水量Wa为( )。
B.
Wa=泡水前试筒和试件质量-泡水后试筒和试件质量
D.
Wa=泡水后试筒和试件质量-泡水前试筒和试件质量
【单选题】图所示三个单跨梁的自振频率分别为wa、wb、wc,其之间关系为( )。
【单选题】中国佛教史上对中国文化思想影响最广一泛的佛教宗派是( )。
【单选题】The desegregation was achieved through a number of struggles,_____have been mentioned in previous chapters.
【单选题】The desegregation was achieved through a number of struggles, ______had been mentioned in the previous chapters.
【单选题】如果一国总人口是1000万,劳动年龄人口是800万,劳动人口是720万,那么失业率是
【单选题】The desegregation was achieved through a number of struggles, ________ been mentioned in previous chapters.
【简答题】在成分三角形中,找出P(wA=70%,wB=20%,wC=10%)、Q(wA=30%,wB=50%,wC=20%)、N(wa=30%,wB=10%,wC=60%)合金的位置。若将5kg P合金、5kg Q合金和10kg N合金熔合在一起,试求新合金的成分。