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【单选题】
逻辑函数Y=( (A + B′) (A′+ C) )′A C + B C的Y’ 是（）A.
（（A’B+AC’）’+A’+C’）（B’+C’）
B.
（A’B+AC’+A’+C’）（B’+C’）
C.
（A’B+AC’）’+A’+C’（B’+C’）
D.
（（A’B+AC’）’+A’+C’）B’+C’
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举一反三
【单选题】A higher U.S. interest rate (i$ ↑) will result in
A.
a stronger dollar
B.
a lower spot exchange rate (expressed as foreign currency per U.S. dollar)
C.
both a) and b)
D.
None of the above
【单选题】Which country ranks the first in terms of the international students in the U.S. in 2013/14?
A.
India
B.
China
C.
South Korea
D.
Saudi Arabia
【单选题】The U.S. ranks_____in the world in the total value of its economic production.
A.
second
B.
first
C.
third
D.
fourth
【单选题】higher U.S. interest rate (i$ ↑) will result in
A.
a stronger dollar.
B.
a lower spot exchange rate (expressed as foreign currency per U.S. dollar).
C.
both a and b
D.
none of the above
【单选题】A higher U.S. interest rate ( i $ ↑) will result in
A.
a stronger dollar.
B.
a lower spot exchange rate (expressed as foreign currency per U.S. dollar).
C.
both a and b
D.
none of the above
【单选题】下列关于创建封装的描述中错误的是（ ）A. 贴片元件的焊盘，通常应放置在 Top LayerB. 穿孔的焊盘，通常应防置在 Multi-LayerC. 元件的外形轮廓定义在 Keepout LayerD. 元件的 3D 模型放置在 Mechanical Layer
A.
贴片元件的焊盘，通常应放置在 Top Layer
B.
穿孔的焊盘，通常应防置在 Multi-Layer
C.
元件的外形轮廓定义在 Keepout Layer
D.
元件的 3D 模型放置在 Mechanical Layer
【单选题】Now I’ve been out of ______ work for weeks, I’ve joined the ranks of ______ unemployedA．the; ／B．
A.
25. Now I’ve been out of ______ work for weeks, I’ve joined the ranks of ______ unemployed A．the; /
B.
the; the
C.
/; the
D.
/; an
【简答题】根据下文补全对话。 Li Ming: Do you know something (1)________ the U.S.? Wang Gang: I know the U.S. is a (2)________ big country. (3)________ capital city of the U.S. is (4)________, D.C. Li Ming: (5)________ d...
【多选题】下列关于创建封装的描述中错误的是（）。
A.
贴片元件的焊盘，通常应放置在TopLayer
B.
穿孔的焊盘，通常应防置在Multi-Layer
C.
元件的外形轮廓定义在Mechanical层
D.
元件的3D模型放置在TopOverlay层
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