There are two websites I think you should know about. Do you find it difficult to say a word correctly? Do you want to hear the correct pronunciation(发音)? If so, what you’ve been looking for is cooldictionary.com. This site is designed to pronounce words and phrases in precise(严谨的) manner. All you have to do is to go to the Pronunciation Help and type in a word. You can also practice your spoken English and improve your communication skill.
   Another useful site is www.nutsandboltsguide.com. It has been specifically designed to help you with every step of writing. This site is a must-visit for all those who want to become a writer. It not only talks about different kinds of writing but also discusses a lot about grammar. I’m sure that this site will help you with your writing skills and different writing styles with its sound tips. So get connected and log in to play. Happy surfing!

【提出问题】标签已经破损的①②③④四瓶溶液分别是什么溶液？