2. 外语
  3. Modern plant breading is largely based on planned hybridization combined with____selection to speed up the evolution of new vari

Modern plant breading is largely based on planned hybridization combined with____selection to speed up the evolution of new vari

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问题 Modern plant breading is largely based on planned hybridization combined with____selection to speed up the evolution of new varieties.
选项 A、stringent
B、stern
C、emergent
D、austere
答案A
解析 分析本题中的四个选项可知，stringent，stern，austere三者都有严厉的意思。它们的区别是：stringent指“措施、操作等是严格的”；stern指“严厉的，一般用来指人”；Austere指的是“环境严峻。或地方简朴无多余装饰，用来指人指庄重的”。emergent意为“紧急的，浮现的，突然出现的，自然发生的”。四个选项中，只有A项符合题意。因此本题答案为A。
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