下列()可用干筛法进行颗粒分析试验。
A.无凝聚性土
B.含粘粒砂土
C.细粒土
参考答案:A
I called Hannah many times yesterday evening,but I couldn't get through. Her brother_____ on the phone all the time!
A.was talking
B.has been talking
C.has talked
D.talked
中子星可以看做一个()球体。