The certificate shall have effect ______ all Chinese ports ．

题库:船长 类型:最佳选择题 时间:2019-02-14 17:22:46 免费下载:《甲类船长英语考证》Word试卷

The certificate shall have effect ______ all Chinese ports ．
A.to
B.for
C.in
D.on

本题关键词:ALL-L1型,ALL-L1型白血病;