第4题: [简答题]Please write the whole passage on ANSWER SHEET TWO. 参考答案:
MONEY Money is accepted across the world as payment for goods or services. People use money to buy food, clothes, and hundreds of other things. In the past many different things were used as money. People on Pacific islands once exchanged shells for goods. The Chinese used cloth and knives. In Africa, elephant tusks or salt were used. Even today some people in Africa are still paid in salt. Coins were first invented by the Chinese. Originally they were round pieces of metal with a hole in the center, so that a piece of string could keep them together. This made doing business much easier, but people still found coins inconvenient to carry when they wanted to buy something expensive. To solve this problem the Chinese again came up with a solution. They began lo use paper money for coins. Now paper notes are used throughout the world.
第31题: [单项选择]当把以下四个表达式用作if语句的控制表达式时，有一个选项与其他三个选项含义不同，这个选项是 A. k%2 B. k%2==1 C. (k%2)!=0 D. !k%2==1 参考答案:D 答案解析:[解析] 本题考查的是判断奇偶数。选项A、B和c中都是当k是奇数时表达式的值为1，否则为0。而选项D中因为逻辑非!运算符的优先级最高，所以当k为0的时候，k的值为1，整个表达式的值也就是1，而当k为非
