题干

一位母亲纪录了儿子3到9岁的身高数据(略),她根据这些数据建立的身高y(cm)与年龄x的回归模型为y=7.19x+73.93,用此模型预测孩子10岁时的身高,则有(  )

A:身高一定是145.83cm

B:身高在145.83cm左右

C:身高在145.83cm以上

D:身高在145.83cm以下

上一题 下一题 0.0难度 选择题 更新时间:2019-12-06 10:43:43

答案(点此获取答案解析)

B

同类题4

阅读理解

In 1901, an Austrian scientist discovered that there are four types of blood. He named them A、B、AB and O. People have one of these four types. Blood type O is the most common around the world. Blood type A is the second most common, and blood type AB is the least common.

    In 1927, a Japanese doctor found that people with different blood types have different personalities (性格),too. He said that people with type A blood are usually calm and serious; people with type B blood are cheerful and outgoing; people with type O blood are generous and honest; while those with type AB blood are often caring and talented.

    More recently, a doctor in the United States wrote a book that connects blood types with what people eat. The book suggests people with type O blood should eat more meat and less bread. A diet for people with type A blood includes more vegetables. His book, Eat Right for Your Type, has been a hit with people who want to lose weight. However, Dr. Peter D' Adamo believes that eating food that matches a person's blood type will make the person healthier in other ways, too.

(第四空三词,其余各题均两词)

People with different ____ have different personalities.

Type A

1). People are calm and serious.

2). People should eat ____.

Type B

People are cheerful and outgoing.

____

1). It is the least common type.

2). People are caring and talented.

Type O

1). People are ____.

2). People should eat more meat and less bread.

If people eat food that matches a person's blood type, they will ____.