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【单选题】
根据生态学原理,要使能量流经食物链时消耗最少,人们应采取哪一种食物 结构( )A.
以禽类、蛋类为主
B.
以淡水养殖的鱼虾为主
C.
以谷物和植物蛋白为主
D.
以猪肉等家畜的肉类为主
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反馈参考答案：
举一反三
【简答题】黄铜卷板,厚度为5毫米
【单选题】在地下水水面之上,沉积物和岩石空隙中液态水不饱和,而充满气,称为____。地下水水面之下,沉积物和岩石空隙中饱含液态水,称为____。在包气带中有局部隔水层存在时,在其上____局部蓄水。
A.
包气带；承水带；不可
B.
包气带；饱水带；不可
C.
包气带；承水带；可
D.
包气带；饱水带；可
【单选题】—Would you like to come to dinner tonight？ —I’d like to, ___ I’m too busy.
A.
and...
B.
so
C.
as...
D.
but
【单选题】-Would you like to come to the dinner party here on Saturday? -Thank you.I’d like to，________I’ll be out of town at the weekend. [ ]
A.
because
B.
and
C.
so
D.
but
【单选题】Can you come over for dinner with us? ----- (_______)
A.
I'd like to but I have a meeting tonight
B.
It doesn't matter
C.
No, I don't like
D.
Oh, that sounds well
【单选题】What would you like for dinner? [ ]
A.
I like rice and soup.
B.
I'd like beef and soup.
【单选题】—Would you like to come to dinner tonight? —I'd like to, ______ I'm too busy.
A.
but
B.
if
C.
and
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