如图为脂蛋白结构图，下列关于脂蛋白的叙述正确的是（　　）

①图中X为磷脂，与蛋白质等共同构成亲水性微粒；

②图中Y含量相对少于胆固醇与胆固醇酯时，脂蛋白密度增高；

③HDL进入肝细胞后被溶酶体小囊泡消化，血液胆固醇含量降低；

④VLDL主要在小肠细胞产生，主要运输Y至肝脏储存．

如图所示，电源电压保持不变，开关S闭合后，灯L₁、L₂都能正常发光，甲、乙两个电表的示数之比是2：3．此时灯L₁、L₂的电阻之比是（    ）

判断对错

一桶水，用去它的 $\frac{2}{3}$ ，正好是20千克，这桶水重30千克

将一块正六边形硬纸片（图1），做成一个底面仍为正六边形且高相等的无盖纸盒（侧面均垂直于底面，见图2），需在每一个顶点处剪去一个四边形，例如图中的四边形AGA^/H，那么∠GA^/H的大小是____度．

阅读理解
    When Dean Arnold got his first job, he was miserable (痛苦的), Each time he went to work, he coughed and he couldn't breathe. Working in a bakery(面包房) when you are allergic to (对…过敏) flour can be painful.
        But Arnold stayed with the National Biscuit Company for ten years. He was a businessman and he helped them improve production. At last his health problems became too serious. He left and formed his own company.
       With his wife and mother, he founded Arnold Bakery. They tried new recipes (配方). changing the kind and amount of flour used. This enabled Arnold to work there without too much pain. The bread, made with unbleached flour (标准粉), was baked in a brick oven (烘炉).
       They began by baking two dozen loaves(条). The bread was sold door to door for fifteen cents a loaf. Winning customers to his unusual, old-fashioned bread took time. But Arnold, struggling against his allergy, built his bakery into one of the largest in the United States.