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【单选题】
As we all know, in the ant city, the queen's job is ______.A.
lying eggs
B.
to lay eggs
C.
to lie eggs
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举一反三
【单选题】____ microprocessors are designed for specialized tasks, such as monitoring the performance of automobile engines, controlling washing machine spin cycles, or running assembly-line robots.
A.
Mainframe
B.
Embedded
C.
both a. and b.
D.
neither a. nor b.
【单选题】PLC 的输入单元通常有几 种类型?
A.
直流、 交流 、 交直流 3种类型
B.
直流和 交直流 2种类型
C.
直流和 交流2种类型
D.
交流 和 交直流2种类型
【简答题】旅游市场的特点有哪些
【简答题】阅读理解。 Doctor Clark was a very busy man. He always worked hard. He often forgot his family's birthday. He loved his wife. He wanted to give her a present. On his way home from his hospital he bough som...
【单选题】Microprocessors and minicomputers are now used () power and size that was much less than previously possible.
A.
at
B.
with
C.
without
D.
for
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