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【单选题】
埋木桩前,将埋入地下的一段表面用火微微烧焦,是因为碳在常温下 ( )
A.
具有吸附性
B.
具有还原性
C.
具有氧化性
D.
化学性质不活泼
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举一反三
【单选题】可作为等张溶液的是
A.
0.9%NaCl溶液
B.
10%葡萄糖溶液
C.
1.9%尿素溶液
D.
20%甘露糖溶液
E.
0.9%葡萄糖溶液
【单选题】Though she is over 60 years old, she still chooses work _____ retirement.
A.
over
B.
at
C.
on
D.
upon
【单选题】可作为等张溶液的是
A.
0.85%的NaCl溶液
B.
10%的葡萄糖溶液
C.
1.9%的尿素溶液
D.
20%的甘露醇溶液
E.
0.85%的葡萄糖溶液
【单选题】可作为等张溶液的是
A.
0.9%的NaCl溶液
B.
10%的葡萄糖溶液
C.
1.9%的尿素溶液
D.
1.0%的NaCl溶液
E.
0.9%的葡萄糖溶液
【单选题】______, she often feels lonely.
A.
She as is rich
B.
Though rich is she
C.
Rich though she is
D.
Rich as she is
【单选题】He glanced over at her, ____that though she was tiny, she seemed very well put together.
A.
noting
B.
noted
C.
to note
D.
having noted
【单选题】_________ she is a little girl, _________ she knows a lot.
A.
Though, but
B.
But, though
C.
Though,/
D.
But. /
【单选题】______she is not in good health, ______she works very hard .
A.
Though, but
B.
/, so
C.
Though, and
D.
Though, /
【单选题】Girl ____, she is much naughtier than a boy.
A.
although she was
B.
though she is
C.
though was she
D.
although was she
【单选题】可作为等张溶液的是
A.
0.85%NaCl 溶液
B.
10%葡萄糖溶液
C.
1.9%尿素溶液
D.
20%甘露醇溶液
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