
【名词&注释】
孤雌生殖(parthenogenesis)、无性生殖(asexual reproduction)、柑橘类植物(citrus plant)
[单选题]50______
A. passed
B. rashed
C. turned
D. continued
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举一反三:
[单选题]The underline word “it” in the second paragraph refers to “ ” .
A. the energy benefitB. the forest loss
B. climate changeD. burning ethanol
[单选题]柑橘类植物可由珠心、珠被等处的细胞发育成胚,这种现象称为( )。
A. 孤雌生殖
B. 无配子生殖
C. 无孢子生殖
D. 无性生殖
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