题目

People the Sailor first became a popular cartoon in the 1930s.The sailor in that cartoon ate lots of spinach to make him strong. People watched him, and they began to buy and eat a lot more spinach. Popeye helped sell 33 percent more spinach than before! Spinach became a necessary part of many people’s diets. Even some children who hated the taste began to eat the vegetable. Many people thought that the iron in spinach made Popeye strong, but this is not true. Spinach does not have any more iron than any other green vegetable. People only thought spinach had a lot of iron because the人体内环境稳态的调节能力是有一定限度的。下列现象中，属于内环境稳态失调的是 A．接受抗原刺激，T淋巴细胞增殖和分化  B．环境温度下降，导致甲状腺激素分泌增加 C．饮食过咸，导致细胞外液渗透压升高   D．血液中钙盐不足，引起肌肉抽搐