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【单选题】
盐酸利多卡因的鉴别反应是( )。A.
加入三氯化铁试液,显紫
B.
在碳酸钠试液中,与硫酸铜反应,生成蓝紫色配位化合物
C.
与硝酸反应,显棕色
D.
在酸性条件下,和亚硝酸钠与B-萘酚反应显橙红色
E.
加入三氯化铁试液,生成赭色沉淀
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举一反三
【简答题】A．add B．apply C．affect D．reflect
【单选题】There were sun-beds and sun-shades _____ shades the entire length of the beach.
A.
along
B.
across
C.
through
D.
over
【单选题】After the Aswan High Dam was built, ______.
A.
almost 100, 000 Egyptians were submerged along with ancient temples
B.
each year tons of mineral-rich silt were deposited on the Nile River floodplain
C.
artificial fertilizer has to be trucked in
D.
the Egyptians started restoring the delta with pumps, drains and wells
【简答题】A．build B．demand C．control D．reflect
【简答题】A．affect B．reduce C．check D．reflect
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