A.卡尔文(M. Calvin)等探明CO2中的碳在光合作用中的转化途径 |
B.赫尔希(A. D. Hershey)等利用T2噬菌体侵染大肠杆菌证明DNA是遗传物质 |
C.梅塞尔森(M. Meselson)等证明DNA进行半保留复制 |
D.温特(F. W. Went)证明胚芽鞘产生促进生长的化学物质 |
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2