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【单选题】
ls=["浣熊","豪猪","叉角羚","棉尾兔"] x="豪猪" print(ls.index(x,0)
A.
0
B.
1
C.
-1
D.
-2
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Passage Two One thing the tour books don’t tell you about London is that 2,000 of its residents are foxes. As native as the royal family, they fled the city about centuries ago after dev...
A.
explain their living habit
B.
make known their habitat
C.
show the endeavors of Londoners to make the city habitable for wildlife
D.
encourage volunteers to do something for the species
【单选题】豪猪烯(hericenes)，形状宛如伏地伸刺的动物，其键线式如右图。下列有关豪猪烯的说法正确的是
A.
豪猪烯与乙烯互为同系物
B.
豪猪烯分子中所有原子在同一平面
C.
豪猪烯的分子式为：C14H20