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【单选题】
下图是某转基因抗虫水稻培育流程图,下列有关分析错误的是( )A.
④过程依据细胞的全能性原理
B.
毒蛋白基因的获得需要RNA聚合酶
C.
①过程所依据的理论基础之一是DNA分子结构的相似性
D.
该基因工程成功的标志是毒蛋白基因在宿主细胞中稳定维持和表达其遗传特性
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举一反三
【单选题】The trade imbalance is likely to rise again nextyear. ________ a new set of policy actions will be required soon.
A.
Thereafter
B.
Otherwise
C.
Hence
D.
Nevertheless
【简答题】The government's action had no effect _____ the trade imbalance.
【单选题】The trade imbalance is likely to rise again in 2020. _____ a new set of policy actions will be required soon.
A.
Because
B.
For
C.
Hence
D.
Therefore
【单选题】The trade imbalance is likely to rise again in 2020. ________ a new set of policy actions will be required soon.
A.
Because
B.
Nevertheless
C.
Hence
D.
Therefore
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