gold黄金;
white gold白金;
alloy合金;
palladium钯金;
titanium钛金;
platinum铂金;
silver白银;
purity黄金纯度;
Karat=K黄金的纯度单位;
sterling silver纯银;
diamond钻石;
carat克拉;
amber琥珀;
amethyst紫水晶;
sapphire蓝宝石;
ruby红宝石
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四年级下册-What do you usually do on weekends-Lesson 28
四年级下册-There are seven days in a week-Lesson 24
四年级下册-How many classes do you have-Lesson 15
四年级下册-There are seven days in a week-Lesson 23
人教(新版)英语四下《Unit 6 would you like to take a trip》(lesson35)flash课件之一
人教(新版)英语四下《Unit 5 what will you do this weekend》(lesson26)flash课件之一
人教(新版)英语四下《Unit 2 It is time to get up》(Lesson 12)ppt课件
四年级下册-Its time to get up-Lesson 7
人教(新版)英语四下《Unit 6 would you like to take a trip》(lesson36)flash课件之一
四年级下册-Its time to get up-Lesson 9
四年级下册-There are seven days in a week-Lesson 21
四年级下册-Welcome to my new home-Lesson 4
四年级下册-Its time to get up-Lesson 11
四年级下册-How many classes do you have-Lesson 14
四年级下册-Welcome to my new home-Lesson 5
四年级下册-What do you usually do on weekends-Lesson 30
人教(新版)英语四下《Unit 2 It is time to get up》(lesson7)flash课件
人教(新版)英语四下《Unit 5 what will you do this weekend》(lesson28)flash课件之一
四年级下册-Welcome to my new home-Lesson 6
四年级下册-How many classes do you have-Lesson 16
四年级下册-There are seven days in a week-Lesson 22
四年级下册-How many classes do you have-Lesson 13
四年级下册-How many classes do you have-Lesson 18
人教(新版)英语四下《Unit 6 would you like to take a trip》(lesson34)flash课件
人教(新版)英语四下《Unit 6 would you like to take a trip》(lesson35)flash课件
人教(新版)英语四下《Unit 2 It is time to get up》(lesson9)flash课件
人教(新版)英语四下《Unit 6 would you like to take a trip》(lesson31)ppt课件
四年级下册-Its time to get up-Lesson 10
人教(新版)英语四下《Unit 6 would you like to take a trip》(lesson31)flash课件
人教(新版)英语四下《Unit 5 what will you do this weekend》(lesson26)flash课件