船长40m以上,常年航行于J级航段的()应设臵双层底或在舭部设臵防撞边舱。
参考答案:自航船
She found her calculator ________ she lost it. [ ]
A. where
B. when
C. in which
D. that
影响中药质量的因素,除品种外,主要还有
A.栽培
B.产地
C.采收加工
D.贮藏
E.运输