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【单选题】
下列说法正确的是:A.
负责航行的值班驾驶员是船长的代表，其首要职责是保持船长规定的航向和航速.
B.
值班驾驶员应遵照《1972年国际海上避碰规则》规定亲自保持正规的了望.
C.
了望人员必须全神贯注地保持正规了望，不得从事或被分派给会影响了望的其他任务.
D.
大型船舶在夜间航行应至少保持两名水手协助驾驶员值班.
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【单选题】Although he was a green hand in the research field, he succeeded ______ other more well-known experts failed. [ ]
A.
which
B.
that
C.
what
D.
where
【单选题】If you have to plough the field anyway, you _____ as well plant crops at the same time.A．mightB．
A.
61. If you have to plough the field anyway, you _____ as well plant crops at the same time. A．might
B.
must
C.
will
D.
should
【简答题】The well-field system regulated that the field could be only allowed to be used but not .
【简答题】只列综合算式不计算 1．A，B两地相距475千米，甲、乙两辆汽车分别从两地相向而行，5小时后相遇。已 知甲车每小时行40千米，乙车每小时行多少千米？ 列式： 2．一项工程，甲队单独做10天完成，甲、乙合作6天完成。乙队单独做几天完成？ 列式： 3．四、五、六年级同学参加植树活动，四年级同学植树45棵，五、六年级同学共 植树的棵数比四年级的3倍少27棵。3个年级共植树多少棵？ 列式：
【单选题】The vegetable looking fresh in his field ______well. It’s often sold out immediately it appears in the market.
A.
has sold
B.
has been sold
C.
is sold
D.
sells
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