花粉粒成熟时,如只含有()和(),称为2一细胞花粉粒(2核花粉粒);如含有()和(),称为3一细胞花粉粒(3核花粉粒)。

花粉粒成熟时,如只含有()和(),称为2一细胞花粉粒(2核花粉粒);如含有()和(),称为3一细胞花粉粒(3核花粉粒)。

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—Important______his discovery was, it was regarded as a matter of no account ...

—Important______his discovery was, it was regarded as a matter of no account ...

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—If we could learn English in the same ______,it would not seem so difficult.A r

—If we could learn English in the same ______,it would not seem so difficult.A r

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—I would like to do the job _____ you don’t force me to study.A in case B althou

—I would like to do the job _____ you don’t force me to study.A in case B althou

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—I thought that honesty ______ the best policy.A was B is C were D be

—I thought that honesty ______ the best policy.A was B is C were D be

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