题目内容
（请给出正确答案）
[主观题]
The crops ______ by the dry weather, so the peasants of that area got much less income las
t year.
A．effected
B．were effected
C．affected
D．were affected
提问人：网友hhhh7123
发布时间：2022-01-07
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A、The insert can be removed by digesting with SalI or XhoI.
B、The insert can be removed by digesting with SalI but not XhoI.
C、The insert can be removed by digesting with XhoI but not SalI.
D、The insert cannot be removed by digesting with either SalI or XhoI.
E、You have no product because the insert and vector cannot be ligated together.
