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【判断题】
对于结构尺寸和质量都很大的重型零件,应采用工序集中原则,以减少装夹次数和运输量。A.
正确
B.
错误
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反馈参考答案：
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】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
【简答题】( 3 ) 在异方差性条件下,普通最小二乘法具有如下性质 ( ) 。 A . 线性 B . 无偏性 C . 最小方差性 D . 精确性 E . 有效性A.B.C.D.E. E
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