单词:trityl chloride
单词:trityl chloride 相关文章
[00:52.51]Please say something about it? [02:14.48]In 1924,Mallory and team of British climbers [02:22.34]tried to get to the top of Mount Qomolangma, [02:29.00]the tallest mountain in the world. [03:05.26]No one had ever done it before. [03:25.61]Ma
Broadcast: Jan 15, 2003 By Jerilyn Watson This is the VOA Special English Health Report. Many millions of people around the world suffer from problems of the small intestine. Bleeding from abnormal gr
[00:00.00]I'm gonna get my car waxed [00:02.49]我要去给车子上蜡 [00:04.99]A:What are you up to [00:05.92]你要去做什么 [00:06.84]B:I'm gonna get my car waxed [00:08.15]我要去给车子上蜡 [00:09.46]The exhaust pipe is blocked [00:11
Scientists know all about the therapeutics qualities of blue and red light. But until know, sufferers of acne have to go to hospital to benefit from it. But Lumie, the manufactures of this new LED device hope it would see light therapy moving to the
[00:02.73] [00:05.82]Listen to This [00:07.77]Write the number [00:10.72]How much does this baseball cap cost? [00:15.99]That one costs $10. [00:21.07]Why don't you buy this green T-shirt? [00:26.20]No,I prefer this red one. [00:30.80]I like these sw
The price of oil has dropped around 20 percent in recent weeks, but remains more than double what it was just a couple of years ago. The high price has given oil companies the incentive to revisit old fields long ago abandoned as unprofitable. As VO