合成甲状腺激素的主要原料有
A．铁和酪氨酸
B．甲状腺球蛋白
C．碘和酪氨酸
D．碘和亚铁
参考答案：C
“试管婴儿”和“克隆羊”这两种生殖方式中，属于有性生殖的是______．
______ the terrible disease, she can't have a good sleep every night. [ ]
A. Learning from
B. Suffering from
C. Looking after
D. Changing into
