下列荷载中属于被动荷载的是()。
A.冻胀压力
B.回填土荷载
C.弹性抗力
D.灌浆压力
参考答案:C
Just a few months before the examination the lazy bone studied day and night _____ that he
should fail. [ ]
A. in case
B. so long as
C. for fear
D. on condition
杜仲在产地加工时应()
A.煮至透心
B.蒸至透心
C.干燥
D.发汗
E.曝晒