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【多选题】
热泵的发展不仅与国民经济总体发展及热泵本身技术进展有关,还与能源的()与(),()与()密切相关。A.
结构
B.
供应
C.
环境保护
D.
可持续发展
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反馈参考答案：
举一反三
【单选题】—We've lived here _____ 2001. —So you've lived here _____ about five years. [ ]
A.
since; for
B.
for; since
C.
for; for
D.
since; since
【单选题】There are some dangerous fishes in this river, and I've warned Jack ______ here. [ ]
A.
not to swim
B.
to not swim
C.
swim not to
D.
to swim not
【单选题】There are some dangerous fish in the river, and I've warned Jack _____ here. [ ]
A.
not to swim
B.
to not swim
C.
swim not to
D.
to swim not to
参考解析：
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