因式分解：x﹣x²=____ ．

任务型阅读根据短文内容，判断正误。
    When I grow up，I'm going to do what l want to do．I'm going to move somewhere interesting．Paris (巴黎)sounds like a city that I could enjoy．There are lots of art exhibitions(艺术展)．I want to be an artist．So how am I going to do it? First，I'm going to find a part-time job for a year or two and save some money．And I'm going to be a student at an art school in Paris．And l want to learn French at the same time．Next，I'm going to hold(举办)art exhibitions because l want to earn some money(挣一些钱)and buy a big house for my parents．I also want to travel all over the world．One day I'm going to retire(退休)somewhere quiet and beautiful．

大大加深了中国半殖民地化程度的不平等条约是（    ）

阅读下面材料, 从A、B、C、D四个选项中选出最佳选项。

    Harold had a very difficult time last night．AIl the other students in his English class went to a party at their teacher's house．but Harold never got there．He followed his teacher's directions(指引), but he made one little mistake．

    From their school, he walked along Main Street to Central Road and turned left．He took the Central Road bus and got off at Fifth Street．He turned left and walked up Park Street to the bus stop at the corner of the street．

    He took Bus Number 42, but he got off the wrong stop．He got off at River Road instead of Rolling Road．He turned left and walked along River Road one block．He turned left again and walked two blocks, turned right, and got completely lost．

Harold was very upset(失落)．He really wanted to go to the party last night, and he can't believe he made such a stupid(愚蠢的)mistake．

被称为“工人革命运动和科学共产主义的出生证”的是(　　)