在方案组合过程中,若存在A、B、C三种因素,对应的形态分别为2、3、4,那么理论上的方案数量为()。
A.9
B.24
C.16
D.27
参考答案:B
根据句意,用括号中所给单词的适当形式填空。
1. The victim's __________ (arrive) made all of us very excited.
2. It's _________ (polite) to laugh at others.
3. He never told truth before. He was a __________ (honest) boy.
4. Male wolves __________ (protect) their families if there is danger.
5. We shouldn't buy clothes __________ (make) of animal fur.
6. They __________ (plan) a trip to Beijing from 6 to 8 yesterday evening.
7. The girl will try her best __________ (learn) English well.
传统电脑票的返奖率和中奖率有什么不同?