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【简答题】
写出下列单词的复数形式。 1. card ___________________ 2. man ___________________ 3. child ___________________ 4. boy ___________________ 5. girl ___________________ 6. ticket ___________________ 7. this ___________________ 8. woman ___________________
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举一反三
【单选题】When the vessel entering the dock, the first work that engineer should contact with the shipyard ____.
A.
releasing the boiler water
B.
the explosion detecting and cleaning for the fuel tank
C.
the docking project related item
D.
shore power and fire fighting water supply
【单选题】配制 SnCl 2 水溶液的正确方法应该是
A.
先把 SnCl 2 固体加入水中，再加热溶解
B.
先在水中加入足量 HNO 3 ，再加入 SnCl 2 固体溶解
C.
先把 SnCl 2 固体 溶解到较 浓 的 HCl 中，再加水稀释至 所需 浓度
D.
先把 SnCl 2 加入水中，再加 HCl 溶解
【单选题】When ship in the dock repairing, engine department should emphasize on the inspection of ____.
A.
sea valve chest, sect valve, thruster
B.
bilge motherboard, steering and the shaft system
C.
sea water system
D.
fresh water system
【单选题】When a tug is in irons，she ().
A.
Is made fast to the dock with engines secured
B.
Is in dry dock
C.
May be in danger of being overrun by her tow
D.
Should pay out more towline
【单选题】关于RIA与IRMA叙述错误的是 ( )
A.
IRMA为非竞争性免疫结合反应
B.
RIA中，放射性核素标记在抗体
C.
IRMA标记物用量是过量的
D.
RIA标记物用量是限量的
E.
IRMA的敏感性高于RIA
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