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【简答题】
输入继电器(X)是专门用来接收 信号的元件。PLC通过输入接口将外部输入信号状态(接通时为“1”,断开时为“0”)读入并存储在 中。
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【简答题】How is it that siblings (兄弟姐妹) can turn out so differently? One answer is that in fact each sibling grows up in a different family. The firstborn is, for a while, an only child, and therefore has a co...
【单选题】Is this one different ________ that one ________ color?
A.
in; in
B.
from; from
C.
from; in
D.
in; from
【单选题】Younger siblings from large families ______.
A.
were unlikely to get stomach cancer
B.
were inescapable to get stomach cancer
C.
were especially prone to get stomach cancer
D.
would live happily
【简答题】A．One is from Thailand and the other is from Japan. B．One is from Thailand and the other is from China. C．One is from Japan and the other is from China. D．One is from Finland and the other is from Ame...
【单选题】From the last paragraph we can conclude that
A.
siblings are not in the range of scientific research.
B.
people learned management skills from family playroom.
C.
spouses learned negotiation skills from their sisters and brothers.
D.
studies on siblings are on their way.
【单选题】To be sure, only children experience some things differently from those with siblings (兄弟姐妹 ). Many feel more pressure to succeed. In the absence of brothers and sisters, only children are also likely...
A.
found a support group for their only children
B.
do volunteer work to help their only children
C.
let their only children make all the decisions alone
D.
set good examples for their only children
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