勒金米塔尔合金,铅基钙钡轴承合金

奥运英语56

Yang: Mandy, Would you like to come for dinner tonight? Yang: Mandy, 你想今天晚上来吃晚饭吗？ Mandy: Dinner? Where? Mandy: 晚饭？在哪儿？ Yang: At the new Five Spices restaurant in Chaoyang. Yang: 在朝阳区的 Five Spices 餐厅。 Mandy: What kind of fo

发表于:2018-12-02 / 阅读(68) / 评论(0)

奥运英语

英语听力文摘 English Digest 664 白金为何是白色的

What Makes White Gold White? Many people associate the metal gold with the color gold. But, some gold jewelry is not golden at all: its white. 图片1 Golden Color Gold is one of the heaviest and softest metals. Pure gold, called 24-carat gold, is so

发表于:2018-12-05 / 阅读(52) / 评论(0)

英语听力文摘 English Digest

SSS 2011-01-24

This is Scientific American's 60-Second Science. I'm John Matson. Got a minute? In a laboratory vault outside Paris is a small cylinder of platinumiridium alloy that serves as the standard for all mass measurements worldwide. By an 1889 international

发表于:2018-12-24 / 阅读(41) / 评论(0)

Scientific American(一)月

英文书摘精选 What Makes White Gold White?白金为何是白色的?

Many people associate the metal gold with the color gold. But, some gold jewelry is not golden at all: its white. 很多人都认为金子就应该是金色。但一些黄金首饰的颜色并不是金色，而是白色。 Golden Color 金色 Gold is

发表于:2018-12-28 / 阅读(29) / 评论(0)

初学者听力文摘精选

英语听力文摘 English Digest 620、白金为何是白色的？

What Makes White Gold White? Many people associate the metal gold with the color gold. But, some gold jewelry is not golden at all: its white. Golden Color Gold is one of the heaviest and softest metals. Pure gold, called 24-carat gold, is so soft th

发表于:2018-12-31 / 阅读(27) / 评论(0)

英语听力文摘 English Digest

双语有声阅读：镍钛合金

Nitinol Nitinol is one of the most extraordinary metals to be discovered this century: A simple alloy of nickel and titanium, nitinol has some perplexing properties. A metal with a memory, it can be made to remember any shape into which it is fashion

发表于:2019-02-17 / 阅读(64) / 评论(0)

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