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【判断题】
感生电动势是指线圈不动而磁场随时间变化，由此引起的感应电动势。()A.
正确
B.
错误
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举一反三
【单选题】The straight line connecting the leading and trailing edges is _______.
A.
span
B.
chord
C.
mean camber line
D.
mean line
【单选题】Which of the following distinguishes a "straight-line" production possibilities curve from one that is "bowed out"?
A.
A straight-line production possibilities curve exhibits increasing opportunity costs, whereas a bowed production possibilities curve does not.
B.
A straight-line production possibilities curve exhibits decreasing opportunity costs, whereas a bowed production possibilities curve does not.
C.
A straight-line production possibilities curve exhibits constant opportunity costs, whereas a bowed production possibilities curve does not.
D.
A straight-line production possibilities curve is upward sloping, whereas a bowed production possibilities curve is not.
【简答题】合成镇痛药主要有()、()、()、()等几大类。
【单选题】If a river flows directly into the sea，the baseline shall be a straight line across ______ between points on the low-water line of its banks．
A.
outer limit of the territorial sea
B.
limit of the territorial sea
C.
breadth of the territorial sea
D.
the mouth of the river
【单选题】______ a river on land, an ocean current does not flow in a straight line.
A.
Alike
B.
Like
C.
Likewise
D.
Likely
【单选题】A line segment, which is part of a straight line, begins at one point ending at another.
A.
and ends
B.
ends
C.
by ending
D.
the end is
【简答题】全合成镇痛药主要有（）、（）、（）、（）等结构类型。
【单选题】A line of position derived from a loran reading is a section of a(n) ______.
A.
straight line
B.
arc
C.
parabola
D.
hyperbola
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