什么是细胞癌基因,其功能是什么?
参考答案:
细胞癌基因又称原癌基因,是细胞内基因,功能是传导信号,调节细胞生长和分化,具有潜在的促发肿癌活性,不适当的激活可引发肿癌。
长期大量应用雌激素可使子宫( ),引起子宫( ),故患有子宫内膜炎者慎用。
—Excuse me, has the train from Beijing arrived yet?
—________, you are three quarters earlier. It's only 9 now.
A.Unconsciously
B.Instantly
C.Actually
D.Absolutely