【单选题】毛泽东在1949年建国前说,总结我们的经验,集中到一点,这就是( )
A.
建立工人阶级领导的以工农联盟为基础的人民民主专政
【单选题】Sailing vessels are stand-on over power-driven vessels except ______.
A.
in a crossing situation
B.
in a meeting situation
C.
when they are the overtaking vessel
D.
on the inland waters of the PR China
【单选题】Avoid this area. No possibility for vessels to turn
A.
It`s advisable for vessels to turn here
B.
It`s impossible for vessels to turn here
C.
It`s impossible for vessels to avoid this area
D.
It`s advisable for vessels to enter this area
【简答题】预防天花的人痘接种法是人工免疫的先驱,其发明的时间最迟是在 。
【单选题】心理学研究者认为学习动机水平与学习效率的关系是( )。
【单选题】Sailing vessels are stand-on over power-driven vessels EXCEPT .
A.
in a crossing situation
B.
in a meeting situation
C.
when they are the overtaking vessels
D.
on the inland waters of the PR China
【单选题】There is a ______ when one or more vessels are towing or pushing another vessel or vessels,provided that they are all involved in commercial activities and not in a salvage operation.
B.
private maritime adventure
D.
common maritime adventure
【单选题】心理学研究认为,学习动机水平与学习效率的关系是()