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【单选题】
醛和酮可用如下的什么试剂鉴别?A.
2 ， 4- 二硝基苯肼
B.
I 2 /NaOH
C.
FeCl 3 水溶液
D.
Tollens 试剂
E.
Lucas 试剂
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【简答题】label parallel saddle version Men these days have to avoid attracting the "ist" ___________. Their ____________ of how the accident happened conflict. These ideas ...
【简答题】in exchange for flare up be dripping with make out of appeal to 1) The brick walls of the ruined buildings _______________ green mold and moisture, and she shivered involuntarily, loo...
【单选题】Determined to avoid all premature speculations, Bacon proposed that data gathering ________ out by illiterate assistants with no interests in whether an experiment turned out one way or another.
A.
is carried
B.
be carried
C.
may carry
D.
being carried
【简答题】You should stand the table on its legs, so that the top is (horizon) ______
【单选题】Determined to avoid all premature speculations, Bacon proposed that data gathering____out by illiterate assistants with no interests in whether an experiment turned out one way or another.
A.
is carried
B.
may carry
C.
being carried
D.
be carried
【单选题】You have determined that you are in the right semicircle of a tropical cyclone in the Northern Hemisphere. What action should you take to avoid the storm?
A.
Place the wind on the starboard quarter and hold that course.
B.
Place the wind on the port quarter and hold that course.
C.
Place the wind on the port bow and hold that course.
D.
Place the wind on the starboard bow and hold that course.
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