问题 单项选择题

特殊运算符“In”的含义是( )。

A. 算术表达式

B. 逻辑表达式

C. 关系表达式

D. 字符表达式

答案

参考答案:C

解析:在做本题之前要先了解各种运算符的优先级,只有了解了之后才能作对。幂运算符(^)优先级最高,其次是取负、乘、浮点除、整除、取模、加减、字符串连接等。其中,乘和浮点除是同级别的运算符,加和减是同级运算符。此外,如果表达式中有括号,则计算括号内的表达式的值。通过运算本题的结果是0。

阅读理解

阅读理解。

    People in the United States honor their parents with two special days: Mother's Day, on the second Sunday

in May, and Father's Day, on the third Sunday in June. These days are set aside to show love and respect for

parents. They raise their children and educate them to be responsible citizens. They give love and care. These

two days make us think about the changing roles of mothers and fathers. More mothers now work outside the

home. More fathers must help with child care. 

    These two special days are celebrated in many different ways. On Mother's Day people wear carnations

which have two colors. A red one symbolizes (象征) a living mother. A white one shows that the mother is

dead. Many people attend religious services to honor parents. It is also a day when people whose parents are

dead visit the cemetery. On these two days families get together to have parties at home, as well as in

restaurants. These are days of fun and good feelings and memories.

    Another tradition is to give cards and gifts. Children make them in school. Many people make their own

presents. These are valued (珍爱) more than the ones bought in stores. It is not the value of the gift that is

important, but it is "the thought that counts". Greeting card stores, florists, candy makers, bakeries, telephone

companies, and other stores do a lot of business during these holidays.

1. Which of the following is NOT a reason for children to show love and respect for parents?

A. Parents bring children

B. Parents give love and care to children

C. Parents educate children to be good persons.

D. Parents pass away before children grow up

2. What do you know from the passage?

A. Mother's Day and Father's Day are both in May.

B. Fewer women worked outside the home in the past

C. Not all the children respect their parents

D. Fathers are not as important as mothers at home

3. Which do you think is right about "carnation"?

A. It has only two kinds of colors.

B. It refers to the special clothes people wear on Mother's Day or Father's Day.

C. It's a kind of flower showing love and best wishes.

D. People can wear carnations only on the second Sunday in May.

4. What do you think "florists" do?

A. They sell flowers

B. They made bread or pastry

C. They offer enough room for having family parties.

D. They sell special clothes for Mother's Day and Father's Day.

单项选择题