皮皮学，免费搜题
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【单选题】
下列哪种氧化铝最不适于分离碱性成分( )。A.
碱性氧化铝
B.
酸性氧化铝
C.
中性氧化铝
D.
以上三种
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皮皮学刷刷变学霸
举一反三
【单选题】We usually cover the Christmas trees ____ colour lights. [ ]
A.
in
B.
use
C.
for
D.
with
【单选题】—What can we cover the roof _______? —The rain is too heavy. [ ]
A.
in
B.
with
C.
on
D.
for
【单选题】The wild flowers looked like a soft orange blanket ______ the desert. A. covering B. covered C. cover D. to cover
A.
covering
B.
covered
C.
cover
D.
to cover
【简答题】A. cover B. spread C. help D. pass
【单选题】The wild flowers looked like a soft orange blanket ________ the desert. A. covering B. covered C. cover D. to cove
A.
covering
B.
covered
C.
cover
D.
to cover
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