【单选题】下列有关线粒体的描述,不正确的是 [ ]
A.
线粒体具有内外两层膜,内膜折叠成嵴,使内膜的表面积大大增加
B.
线粒体内膜和基质中含有许多与有氧呼吸有关的酶
【简答题】若抛物线的顶点在坐标原点,焦点是椭圆 的一个焦点,则此抛物线的焦点到准线的距离是 .
【单选题】In the third paragraph, the underlined phrase 'this reward' refers to '______'.
【简答题】阅读下面短文,用括号内动词的适当形式填空,必要时可加助动词,将答案写在文后相应的横线上。 The story happened during the Second World War. A 70-year-old man lived in a small town of Germany. His three sons all worked in the same factory where he ...