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A. The large number of Internet users who speak non-alphabet language.
B. The decrease of users who speak English.
C. The effective promotion from the international organizations.
D. The increasing number of non-English speaking users.

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蓝藻细胞的原生质体分_______和_______两部分,其中光合色素分布在_______部分。

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A. It is available in small airports and can fly further.
B. It can reduce fuel emissions by about 20%.
C. It is equipped with sports and entertainment facilities.
D. It provides more comfortable seats for passengers.

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A. It represents remarkable technological development.
B. It will not do any harm to the environment.
C. We passengers won"t benefit from its fuel efficiency.
D. It will not solve the problem of damaging the environment.

藻类植物的生活史分为哪3种类型?举例说明。

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