有8个候选人竞选学生会 * * (1号、2号、3号、4号、5号、6号、7号、8号)。竞选满足以下条件：
如果3号的票数多于4号，并且5号的票数多于8号，那么1号当选
如果4号的票数多于3号，或者6号的票数多于7号，那么2号当选
如果8号的票数多于5号，那么6号当选
如果上述陈述为真，并且事实上5号的票数多于8号，而1号没有当选，则以下哪项陈述必为真( )
A．4号的票数不比6号多
B．3号的票数不比4号多
C．2号当选为学生会 * *
D．6号当选为学生会 * *
参考答案：B
解析： 由“1号没有当选”和“如果3号的票数多于4号，并且5号的票数多于8号，那么1号当选”可得，或者3号的票数不多于4号，或者5号的票数不多于8号。又“5号的票数多于8号”，否定一个选言肢就能肯定另一个选言肢，所以3号的票数不多于4号，B项正确。
| 选词并用其适当形式填空（有的词可重复使用）。 | |
It is like a 2 to the moon. When you are under water, it is easy for you 3 big rocks (岩石), because you are no longer heavy. Here, under water, everything 4 blue and green. During the day, there is plenty of (大量的) light. When fish swims near by, you can 5 them with your hands. When you have tanks (罐) of air on your back, you can 6 in deep water for a long time. But you 7 be careful when you dive in deep water. To 8 fish is one of the most interesting parts of this sport. Besides (此外), there are more uses for skindiving. You can clean ships without 9 them out of water.You can 10 many things from the deep sea. Now you see that skin-diving is both useful and interesting. 1._____2._____3._____4._____5._____ 6._____7._____8._____9._____10._____ |