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【单选题】
下面关于分程控制回路的描述中错误的是（）。A.
一台控制器的输出可以同时控制两台甚至两台以上的控制阀
B.
控制器的输出信号被分割成若干个信号范围段
C.
由每一段信号去控制一台控制阀
D.
输出信号的分段一般是由控制阀来实现的
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【单选题】What was suggested about the construction of a new city at sea?
A.
The city was to be designed together with a harbor.
B.
The walls around the city would be made of steel and glass.
C.
The building of the city would rest on a floating island.
D.
The people would live in tall building surrounded by a wall.
【单选题】Warm People Likely to Keep Cold at Bay Staying positive through the cold season could be your best defense against getting ill, new study findings suggest. In an experiment that exposed healthy volunt...
A.
that their illness is very serious
B.
that their illness is not so serious
C.
that they do not get any illness at all
D.
that the illness they get is not a mild one
【单选题】Not only _____ polluted, but _____ crowded.
A.
was the city; were the streets
B.
the city was; the streets were
C.
was the city; the streets were
D.
the city was; were the streets
【单选题】Warm People Likely to Keep Cold at Bay Staying positive through the cold season could be your best defense against getting ill, new study findings suggest. In an experiment that exposed healthy volunt...
A.
that their illness is very serious
B.
that their illness is not so serious
C.
that they do not get any illness at all
D.
that the illness they get is not a mild one
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