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【单选题】
下列有关群落演替的叙述 , 不正确的是A.
群落演替的过程中种群基因频率会发生改变
B.
群落演替的过程中种间关系会不断调整
C.
初生演替相对于次生演替进程缓慢、时间长
D.
群落演替的最终阶段都形成森林
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举一反三
【简答题】颅内压增高重要的客观体征（ ）。
【单选题】The house was very quiet, ____ as it was o n the other side of a mountain. being isolated isolated isolating having been isolated
A.
being isolated
B.
isolating
C.
isolated
D.
having been isolated
【单选题】—Do you like these kinds of cigarette? — ______ cigarette agrees with me.
A.
Hardly no
B.
Nearly no
C.
Rarely no
D.
Almost none
【简答题】听力原文： The cigarette industry began in the 1870s with the development of the cigarette manufacturing machine. This made it possible to produce great numbers of cigarettes very quickly, and it reduced t...
【单选题】Bows and arrows have _______ been out of use.
A.
long after
B.
long before
C.
before long
D.
long since
【单选题】Lucy _____ a short nose, but I _____ a long one.
A.
have ; have
B.
have ; has
C.
has ; have
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