皮皮学,免费搜题
登录
搜题
【简答题】
Paper was first made in the year 105A.D.(公元). It was made by a man named Ts’ai Lun. He lived in China. For over 500 years paper was made only in China. People in Japan learned of paper around the year 600. As years went by, people in other places began to make paper. The lead (铅) pencil is not made of lead. It is made of graphite (石墨). People found graphite in 1564. They thought it was a kind of lead. Today we still call pencils "lead pencils". The first Wooden (木头) pencils were made by Kasper Faber. In 1761 he started making pencils in Germany (德国). Erasers (橡皮) like those we use today were first made in 1752. They were made in France by a man named Magellan. A man named Hyman L. Lipman first put erasers on the ends of pencils. And that is how the pencil came to be now.
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
.
..
皮皮学刷刷变学霸
举一反三
【多选题】以KMnO4法测定MnO2含量时,在下述情况中对测定结果产生正误差的是
A.
溶样时蒸发太多
B.
试样溶解不完全
C.
滴定前没有稀释
D.
滴定前加热温度不足65℃
【单选题】to cause sudden fear to, frighten
A.
scare
B.
inquiry
【单选题】中国共产党第一次独立解决中国革命实际问题的会议是( )。
A.
中华苏维埃第一次全国工农兵代表大会
B.
遵义会议
C.
瓦窑堡会议
D.
七届二中全会
【单选题】在复本位制下,市价较高的金属所铸成的货币,常被市价较低的金属货币所替代而不能流通,这就是所谓的( )。
A.
一价定律
B.
格雷欣法则
C.
良币驱逐劣币规律
D.
奥姆法则
【单选题】中国特色社会主义理论体系的立论基础是( )。
A.
马、恩关于未来社会发展阶段问题的认识
B.
社会主义社会主要矛盾问题
C.
我国正处于社会主义初级阶段
D.
列宁关于社会主义发展阶段理论
【多选题】以KMnO4法测定MnO2含量时,在下述情况中对测定结果产生正误差的是()
A.
溶样时蒸发太多
B.
试样溶解不完全
C.
滴定前没有稀释
D.
滴定前加热温度不足65℃滴定速度的要求错误的
【单选题】燃烧法测定有机物碳、氢含量时能够消除硫、卤干扰的催化剂是
A.
CuO+Co3O4
B.
Co3O4
C.
CuO
D.
AgMnO4
【简答题】请根据税法认知学习的相关知识,制作一张结构合理,条理清楚,内容丰富,重点突出,表述清晰的思维导图。
【简答题】在复本位制下,市价较高的金属所铸成的货币,常被市价较低的金属货币所替代而不能流通,这就是所谓的( )。
【单选题】在经络系统中具有离入出合循行特点的是
A.
奇经八脉
B.
十五络脉
C.
十二经别
D.
十二经筋
相关题目: