The applications of genetic engineering are abundant and choosing one appropriate for this case can be rather difficult.

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问题 The applications of genetic engineering are abundant and choosing one appropriate for this case can be rather difficult.

选项 A、sufficient
B、plentiful
C、adequate
D、countable

答案B

解析 abundant大量的。sufficient足够的；plentiful丰富的，大量的；adequate充分的，足够的；countable可计算的。

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