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【简答题】
一个恒定电流5A与内阻4Ω并联的电流源可以等效变换成内阻为 Ω与一个恒定电压为 V串联的电压源。
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皮皮学刷刷变学霸
举一反三
【单选题】-Your sweater looks very nice. What’s it made__________? -Wool, and it’s made__________ Guiyang. [ ]
A.
from, on
B.
of, in
C.
of, on
D.
from, in
【单选题】听力原文：W: The product is very light. What's it made of? M: It's made of plastic. But it's very strong. Q: What can we learn about the product? (4)
A.
It is heavy.
B.
It is soft.
C.
It is made of plastic.
D.
It is strong and heavy.
【单选题】— What is your scarf made ______? — Silk, and it’s made ______ Hangzhou.
A.
in, of
B.
of, by
C.
of, in
D.
by, in
【单选题】There is today's newspaper.
A.
nothing new in
B.
something new on
C.
important something in
D.
nothing important on
【单选题】Is there ( ) in today's newspaper?
A.
exciting anything
B.
anything excited
C.
excited anything
D.
anything exciting
【简答题】标准正态分布的均值为1，标准差为0。（ ）
【单选题】What is it made of?
A.
It's made of metal and glass.
B.
It's made of metal and wood.
C.
It's made of paper, not metal.
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