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1. Results In PCR, the primer for internal reference gene, content of dNTP, and runing cycles affect the products much than the annealing temperature. 结果在PCR反应中,扩增内参照和目的基因的引物比例、底物浓度以及PCR反应的循环次...


1.I am running 2.He is listening music 3.We are cleaning classromm 4.My mother isn't making soup 5.Ther are't cuttingdown trees 6.Are you washing the dishes.Yes,I am 7.I'm not using computer 8.Is your grandpa reading newspaper

填 Is running 若有疑问及时追问,如满意请点击下面的“选为满意答案”按钮,谢谢!O(∩_∩)O

run jog swim

She is running after a cat.


Tom isn't running in the park.

动词的现在进行时一般是直接加ing,run的现在分词形式是双写n再加ing,running 满意请采纳,谢谢

She isn't running.She doesn't run. Dad is driving.Dad doesn't drive. I am not going.I do not go.

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