粘性土的渗透系数与土颗粒的级配情况无关。（）
参考答案：错
— Excuse me. Where is the zoo?
— Sorry, I don't know. Ask that policeman. He _____ know. [ ]
A. shall
B. may
C. need
D. would
脑乐静的功能是（）。
A.清心安神
B.养心安神
C.健脑安神，生精补髓
D.补气健脾，安神益智
E.滋阴养血，补心安神
