铅垂面MEF和直线AB平行[img=309x207]180310386c593c4.png[/img]

果蝇的（铁皮人）基因在小鼠中的同源基因是（ ）。 A: Tbx5 B: Mef2c C: Gata4 D: Nkx2-5

心肌细胞特异性的转录因子组合（ ）可以使成纤维细胞转分化为心肌样细胞。 A: Oct4, Sox2, Klf4, c-Myc B: Nkx2-5, Gata5, Tbx3 C: Gata4, Mef2c, Tbx5 D: Ngn3, Pdx1, Mafa

M: Do you have anything ready-made that will fit meF: Sorry, your size is not usual. Even the extra large doesn’t fit you.M: Then, what do you suggestF: Can I write down your size and make a special order for youM: When will it be ready thenF: Tomorrow next week maybe. Why doesn’t the suit fit the man(). A: He is too short. B: He is too tall. C: He is unusual.

若\( \int {f(x)dx = {x^2} + C} \)，则\( \int {xf(1 - {x^2})dx = } \)( ) A: \( 2{(1 - {x^2})^2} + C \) B: \( - {1 \over 2}{(1 - {x^2})^2} + C \) C: \( {1 \over 2}{(1 - {x^2})^2} + C \) D: \( - 2{(1 - {x^2})^2} + C \)

HbF的构成主要是（） A: α2β2 B: α2δ2 C: ζ2ε2 D: α2γ2 E: ζ2γ2

成年人红细胞中的血红蛋白主要结构为（）。 A: Aα2ε2 B: Bα2γ2 C: Cα2β2 D: Dβ2γ2 E: Eβ2ε2

正常人血红蛋白多肽链的组成是 A: α2β2 B: α2γ2 C: α2ε2 D: α2δ2 E: σ2β2

HbF的结构为（） A: Aα2β2 B: Bα2γ2 C: Cα2δ2 D: Dα2ε2 E: E以上都不是

若∫f(x)dx=x+C，则∫xf(1-x2)dx=______ A: 2(1-x2)+C B: -2(1-x2)+C C: -1/2(1-x 2 ) 2 +C D: 1/2(1-x 2 ) 2 +C