根据短文内容，选择正确答案。

    I am a student in China now. My name is Kelly Smith. I live with my parents, two sisters and a brother in Beijing. My parents teach English in No. 6 Middle School. I study in the same school. I am happy here, because I like my new school and the classmates. They are very kind to me. They like to play with me because I look different from them. I have blue eyes and long blond hair. They often say I look like a doll. Also I speak English well. so lots of students like to tam with me to improve (提高) their English.

解下列方程组：

李贽说：“寒能折胶，而不能折朝市之人；势能伏金，而不能伏竞奔之子。何也？富贵利达所以厚吾天生之五官，其势然也。是故圣人顺之，顺之则安之矣。”据此可知李贽（   ）

右图是显微镜结构示意图，要使镜筒作较大范围升降，应调节图中的