李大钊在《布尔什维主义的胜利》中指出：1917年的俄国革命，是立于社会主义之上的革命。上述认识的得出，主要是由于李大钊

不属于宇宙空间的特点是（   ）

电视已经走进了千家万户，是我们生活的重要组成部分。每个人都有自己最喜爱的电视节目。下面是五个人的描述，请根据他们的描述从A-F中为他们选择合适的电视节目。
____ I am 73 years old. I often watch TV in my free time. Of all the programs, I like the news best. Through the TV, I can learn what is happening in our country and in the world. At seven every evening , I always sit in front of the TV.
____ I am a grandma. I like Chinese traditional opera. From Monday to Thursday, I usually turn on the TV at half past seven. The programs from CCTV7 are my best.
____ I am a basketball fan. I like playing basketball very much. But I am too busy. So I have to watch it on the TV. Every night, I watch the match till midnight.I am crazy about it , especially NBA
____ I am a housewife. I do the housework all day, I’d like to watch TV at night. I prefer to see soap operas like ‘palace”, “meteoric garden” and so on.Because they can make me feel relaxed.
____ I am the only son in the family. I am in Grade Five. I like cartoons best. I often watch cartoons on the TV after doing the homework.
 
A   B
 
C                         D                     
 
E                         F.

太阳光透过一个矩形玻璃窗户，照射在地面上，影子的形状不可能是（　　）

下列关于“禁毒”、“预防艾滋病”的认识正确的是（　　）