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【判断题】
燃料的燃烧速度主要取决于燃料和空气的化学反应所需要的时间，而不是取决于他们相互扩散和掺混的时间。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】Questions 27 to 30 are based on the passage you have just heard.
A.
They want to go camping.
B.
They have decided to go hunting bears.
C.
They want to go exploring in the country.
D.
They haven't reached a decision yet.
【简答题】dia()()()ea 腹泻
【简答题】média
【单选题】You've got your flat furnished,haven't you?—Yes,I______some used furniture and it was a real bargain.
A.
will buy
B.
have bought
C.
had bought
D.
bought
【单选题】(苏锡常镇四市二调)--Haven't seen you for ages! Where have you been?--I ___in Xinjiang for one year, volunteering services as a doctor.
A.
have stayed
B.
stay
C.
stayed
D.
am staying
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