下列哪个是脂酸
A. 顺丁烯二酸
B. 亚油酸
C. 苹果酸
D. 琥珀酸
E. 柠檬酸
下列那种叙述是正确的?
A. 所有的磷脂分子中都含有甘油基
B. 脂肪和胆固醇分子中都含有脂酰基
C. 中性脂肪水 解后变成脂酸和甘油
D. 胆固醇酯水解后变成胆固醇和氨基糖
E. 碳链越长,脂肪酸越易溶 解于水
乳糜微粒、中间密度脂蛋白 (IDL)、低密度脂蛋白 (LDL )和极低密度脂蛋白 (VLDL )都是血 清脂蛋白,这些颗粒按密度从低到高排列,正确的次序是()
A. LDL、IDL、VLDL、乳糜微粒
B. 乳糜微粒、VLDL、IDL、LDL
C. VLDL、IDL、LDL、乳糜微粒
D. 乳糜微粒、VLDL、LDL、IDL
E. LDL、VLDL,IDL,乳糜微粒
Listen to five short conversations and choosethe best answer to each question you hear.[音频]
A. He was taking care of someone.
B. He had panned to do something else.
C. He was expecting someone to call him.
D. He had to handle something unexpected.
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