已知$\overrightarrow{a}=\left(1,2\right),\overrightarrow{b}=\left(x,1\right)$且$\left(\overrightarrow{a}+2\overrightarrow{b}\right)$∥$\left(2\overrightarrow{a}-\overrightarrow{b}\right)$，则x为 （   ）

A：Look! I have a new doll and some toy pandas.

B：Oh, they are very lovely. ____

A：I have sixteen.

B：Do you have any toy pandas, C?

C: ____

B：What do you have?

C：I have some toy lions. What about you, B?

B：I have many stickers, they're in my bag.

A：Great! I like stickers. ____

B：Sure. ____

A：Thanks.

B： ____

①～⑤的病症分别与其对应的病因A～E对应关系都正确的是（　　）

①侏儒症                     A  营养物质缺乏

②佝偻病                     B  激素分泌异常

③艾滋病                     C  冠状动脉堵塞

④冠心病                     D  病毒性感染

⑤白化病                     E  遗传物质发生改变．

人和动物体内的主要能源物质是（   ）