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【单选题】
科学是什么颜色的？”这个问题属于什么样的研究问题？（ ）A.
虚假的研究问题
B.
错误问题
C.
形而上学的问题
D.
似是而非的问题
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反馈参考答案：
举一反三
【简答题】Over forty years (pass) ______ since the first bridge was built in the district.
【简答题】浓水反渗透浓水补水至三循，三循（ ）及碱度增加。
【单选题】The teacher knows that you are always the first ________ to the classroom since last September.
A.
coming
B.
to come
C.
came
D.
has come
【单选题】The first use of atomic weapons was in 1945, and their power _____ increased enormously ever since. [ ]
A.
is
B.
was
C.
has been
D.
had been
【单选题】The teacher knows that you are always the first ________ to the classroom since last september.
A.
coming
B.
to come
C.
came
D.
has come
【单选题】Which floor is the meeting room?
A.
On the fifth floor.
B.
On the sixth floor.
C.
On the fourth floor.
【单选题】Which floor does Linda live on?
A.
The fourth floor.
B.
The fifth floor.
C.
The sixteenth floor.
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