问题 单项选择题

某旅游团去木兰围场旅游,团员们骑马、射箭、吃烤肉,最后去商店购买纪念品。已知: (1)有人买了蒙古刀。 (2)有人没有买蒙古刀。 (3)该团的张先生和王女士都买了蒙古刀。 如果以上三句话中只有一句为真,则以下哪项肯定为真

A.张先生和王女士都没有买蒙古刀

B.张先生买了蒙古刀,但王女士没有买蒙古刀

C.该旅游团的李先生买了蒙古刀

D.张先生和王女士都买了蒙古刀

答案

参考答案:A

解析: 演绎推理题。如果条件(3)“该团的张先生和王女土都买了蒙古刀”为真,则条件(1)“有人买了蒙古刀”必为真,这与题干“以上三句话中只有一句为真”矛盾,故条件(3)为假,即:张先生和王女士至少有一人没买蒙古刀,从而推出条件(2)“有人没有买蒙古刀”为真,进一步知条件(1)“有人买了蒙古刀”为假,再进一步推出:所有人都没买蒙古刀。

探究题
阅读理解

Popeye the Sailor first became a popular cartoon in the 1930s. the sailor in that cartoon ate lots of spinach to make him strong. People watched him, and they began to buy and eat a lot more spinach. Popeye helped sell 33 percent more spinach than before! Spinach became a necessary part of many people’s diets. Even some children who hated the taste began to eat the vegetable.

Many people thought that the iron in spinach made Popeye strong, but this is not true. Spinach does not have any more iron than any other green vegetable.

People only thought spinach had a lot of iron because the people who studied the food made a mistake. In the 1890s, a group of people studied what was inside vegetables. This group said that spinach had ten times more iron than it did. The group wrote the number wrong, and everyone accepted it.

Today, we know that the little iron in spinach cannot make a difference in how strong a person is. However, spinach does have something else which the body needs—folic acid.

It is interesting to point out that folic acid can help make a person strong. Maybe it was really the folic acid that made Popeye strong all along.

小题1:A good title for this reading passage is______.

A.Popeye the Sailor

B.The Truth About Spinach

C.A Mistake with Numbers

D.Folic Acid Makes You Strong小题2:Why did many people eat spinach after they saw Popeye the Sailor?

A.People liked folic acid.

B.They thought Popeye was funny.

C.Spinach had a lot of iron.

D.They thought spinach made them strong.小题3:A research group told people that spinach______.

A.made Popeye strong

B.was a green vegetable

C.had less iron than other green vegetables

D.had more iron than other green vegetables小题4:The reading passage says that perhaps Popeye got his strength from______.

A.iron

B.spinach

C.folic acid

D.exercise