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【单选题】
对热原的性质叙述正确的是A.
反渗透法不能除去热原
B.
250℃ 30～45分钟可以彻底破坏热原
C.
热原大小约在1～5nm之间，可以被微孔滤膜截留
D.
热溶于水，超滤装置也不能将其除去
E.
活性炭可以吸附色素与杂质，但不能吸附热原
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举一反三
【单选题】How will the man enter Ashley's office?
A.
He will use a master key to open the door.
B.
He will get Ashley's key from the woman.
C.
He will ask the department's secretary for help.
D.
He will force the lock with a hammer.
【单选题】Don’t________the window. It’s ________outside.
A.
opening; wind
B.
open; windy
C.
opens; wind
D.
to open; windy
【单选题】听力原文：W: Hi, Tom. M: Judy, I haven't seen you in weeks. Where have you been? W: In Florida. M: What, vacationing while the rest of us have been studying on campus in the February cold. W: Not exactly, ...
A.
Sightseeing.
B.
Taking photographs.
C.
Enjoying sunshine.
D.
Diving.
【单选题】听力原文：Can I open the window? (7)
A.
Yes, I'd love to.
B.
Yes, please.
C.
Yes, I can't agree with you.
【简答题】选择方框内所给的单词并用适当形式填空。 Stop live scientist protect animal kind difference open easy wild Years ago, many zoos kept all 1______ of animals in small cages. Small cages made it 2______ for people t...
【单选题】The buyer shall open wi th a bank ________ is accepted by the seller an irrevocable L/C.
A.
what
B.
this
C.
where
D.
which
【单选题】下列说法中,不正确地是( )
A.
一个Java源文件编译通过后,得到的结果文件数只有一个。
B.
一个Java源文件编译通过后,得到的文件扩展名一定是.class
C.
一个Java源文件只能有一个public类的定义,其类名于源文件名相同。
D.
一个Java源文件可以包含多个类。
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