题干

等腰三角形的两边长分别为3cm和7cm,则周长为(  )

A:13cm

B:17cm

C:13cm或17cm

D:11cm或17cm

上一题 下一题 0.0难度 选择题 更新时间:2019-11-23 12:03:22

答案(点此获取答案解析)

B

同类题3



Monday

8—10 a. m

TECHNOLOGYInformation Technology (IT )—Using the Internet

In this lesson, students learn how to surf the internet safely and effectively. There will also be information about using different search engines. Finally, this lesson teaches students about the best websites to use to continue their education online.

10—12 a. m

ARTS

10:00 a. m

DRAMA

Students learn the play that the teacher gave before class. During this lesson, students will have the chance to act out roles with other students.

11:00 a. m

PAINTING WITH WATERCOLOURS

For most of this term, students learn how to use watercolours properly to make pictures. If the weather is good, the lesson may take place outdoors.


LUNCH

1—2 p. m

SCIENCES Biology/Chemistry

Students can choose which class to attend

In biology this week, the topic is Human Body. Students will learn about how it works.

Alternatively, students can study chemistry. This class takes place in the science lab, and this week students learn about H2and O2

2—4 p. m

SPORTS

2:00 p. m

SIKLLS

Students learn about the skills in a certain sport. We use video to see real action from past games.

3:00 p. m

PRACTICE

After we have picked teams, students will play a short match lasting 45 minutes. This week, the sports are football(for boys) and tennis (for girls)


HOMEWORK

IT— the teacher will give students websites to look up at home (about 30minutes)

Drama –students have to learn a part for the next lesson (about 40 minutes)

Biology/ Chemistry—students have to write a short report of the lesson (about 20 minutes)

同类题5

阅读材料,完成下列要求。

材料一:贸易保护的形式多样,除关税保护外,还有外汇管制、卫生检疫、环保标准和技术标准等。1841年弗里德里希•李斯特发表《政治经济学的国民体系》,强调国家在经济生活中的重要作用,论证了实行关税保护发展民族工业的必要性。从19中后期起,美国绝大部分时间都是共和党人入主白宫,他们是工商业的政治代言人,要求提高关税,限制外国廉价劳动力制造的商品进入美国,降低竞争,保障美国工人的就业率和高工资,促进美国经济发展。此时,加拿大、意大利、德国、法国、日本等纷纷颁布关税保护法。1821—1897年美国关税平均税率是:1821—1824年为44.62%,1825—1832年为50.92%,1833—1857年为35.1%,1864—1866年为48.3%,1897年为57.00%。

——摘编自褚浩《19世纪后期美国贸易保护政策研究》

材料二:关税自主成为近代中国对外贸易的关键。近代以来我国对外贸易连年遭受损失,入超现象相当严重。民国时期的工商界人士十分重视关税对贸易的保护作用,解决这个历史遗留问题始终成为当时中国人的梦想。1917年北洋政府国定进口税则、还通过巴黎和会、华盛顿会议、关税特别会议等与列强力争关税自主。南京政府通过多次修约,与列强艰难周旋,最终在形式上和法律上确立了关税自主的地位。

——摘编自罗希红《民国时期对外贸易政策特殊分析》