问答题

烟叶信息化的工作最早是从解决基层站点烟叶收购过程中大量的单据计算、称重、统计汇总开始。此类系统一般由( )。此题为多项选择题。

A.上位机
B.下位机
C.电子秤
D.接口电路

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单项选择题

In four strokes engine, the cycle of events is completed in four strokes of _____.
A.the cylinder
B.the crankshaft
C.the piston
D.the cross-head

A.
A.the
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D.the

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When the ships is going to enter into the harbor, _____.
A.change from diesel oil to heavy fuel oil for mail engine
B.pump out bilge water
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A.
A.change
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C.change
D.test