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【单选题】
田纳西河流域的综合开发中，土地利用是其重要方面之一。下列相关叙述正确的是A.
在土地规划中，留出大面积的土地用于发展种植业
B.
调整农业、林业和牧业结构，扩大耕地面积，大力发展棉花种植
C.
采取围湖造田、砍伐森林等措施提高耕地的比重
D.
采取措施稳固河、湖岸线，有效地控制了水土流失
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【单选题】The Lakers' forward Kobe Bryant has scored 50 or more points in four straight games, second in the NBA only to Wilt Chamberlain's seven. He also now is tied with Michael Jordan for second with four be...
A.
Kobe Bryant is the second in the NBA for what he got 50 or more points in four games.
B.
Wilt Chamberlain used to get 60 or more points in seven straight games, first in the NBA.
C.
Michael Jordan is in the third place with four behind Chamberlain's 32 in most 60-point games.
D.
Michael Jordan is equal to Kobe Bryant in most 60-point games.
【单选题】A( n)______shape has four straight sides at 90°to each other, two of which are much longer than the other two.
A.
square
B.
oval
C.
oblong
D.
circular
【单选题】A(n) __________ shape has four straight sides at go to each other, two of which are much longer than the other two.
A.
square
B.
oval
C.
circular
D.
oblong
【单选题】Do you remember the popular singer __________ long straight hair?
A.
has
B.
is
C.
looks like
D.
with
【简答题】若图3(b)中I=-2A,R=3Ω,则U=?
【单选题】Four long straight wires carry equal currents into the page as shown. The magnetic force exerted on wire F is:
A.
north
B.
south
C.
east
D.
west
【单选题】How long was the journey home for the Polos?
A.
four years
B.
three years
C.
twenty-four years
D.
five years
【单选题】Her hair is _________ . [ ]
A.
four feet's long
B.
four-foot-long
C.
four-feet long
D.
four feet long
【简答题】下图中,Vcc=12V, R b ’ =100kΩ,放大倍数 b=100 ,并记 R b = R b ’ + R w ,问: (1)当输入电压 u i =0时,测得 U BEQ =0.7V, U CEQ =6V,若要基极电流 I BQ =20μA,则: 1 R b 的值约为 R b ≈ kΩ(值取整数) ; 2 R c 的值约为 R c ≈ kΩ (值取整数) . (2)若测得输入电压有效值 u ...
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