给下列物理量数据后面填上适当的单位： （1）一瓶矿泉水的质量为5×102；（2）
题型：填空题
问题：
给下列物理量数据后面填上适当的单位：
（1）一瓶矿泉水的质量为5×102 ；（2）一名中学生的体重约为500 .
题型：填空题
The Barbie doll first appeared at the toy fair in New York in 1959. Its creator was Ruth Handler, an American businesswoman. She and her husband Elliott along with Harold Matt Matson started the toy company Mattel. She based the design of the new doll on a German doll named Bild Lilli and named her after their daughter Barbara.
The first Barbie wore a black and white swimsuit and had her hair in a ponytail(马尾辫). She looked very grown-up. But any concerns that parents would not want to buy it for little girls were soon proved wrong.
Mattel sold 300,000 Barbie dolls in the first year at a pri
ce of three dollars. Today, a fifty-year-old Barbie in good condition might cost more than 27,000 dollars.
Barbie dolls have represented 50 different nationalities and are sold in 150 countries. Mattel says 90% of girls in the United States between the ages of three and ten own at least one Barbie doll. It says girls between the ages of three and six own an average of about 12.
Barbie also faced her share of critics. A well-known example was when women’s education groups objected to a talking Barbie doll that declared, among other things, “Math class is tough!” Mattel agreed to change it. Saudi Arabia has banned Barbie dolls. And a lawmaker in the American state of West Virginia would like to do the same. Last month, he proposed banning sales of Barbie and other dolls that influence girls to put too much importance on physical beauty.
Some people say Barbie is an unhealthy role model for young girls. Robin Gerber disagrees. She wrote a book about Barbie. She points out dolls like scientist Barbie and race car driver Barbie. She says people who criticize Barbie should tell girls the story of the businesswoman who created her. She says Ruth Handler wanted the dolls to help girls think about what they wanted to do with their lives.
小题1:The first Barbie doll might not be popular among little girls because _______.
A．her hairstyle was out of fashion
B．her appearance looked much too mature
C．her way of dressing was against the tradition
D．physical beauty wasn’t thought to be important小题2:From the passage we know that Mattel ________.
A．is one of the world’s largest toy companies
B．is the director of an American toy company
C．was the woman who originally created Barbie
D．was a salesman who was good at selling Barbie dolls小题3:Barbie dolls are criticized partly because they make girls ________.
A．pay too much attention to their physical beauty
B．neglect their schoolwork and inner beauty
C．prefer physical beauty to inner beauty
D．waste too much time and money on clothes小题4:It can be inferred from the last paragraph that in her book Robin Gerber ________.
A．shows Barbie dolls have a negative influence on girls
B．praises a successful person who sells Barbie dolls
C．expresses her own favorable opinion about Barbie
D．argues for banning the sales of Barbie dolls