Cells cannot remain alive outside certain limits of temperature and much narrower limits mark the boundaries of effective functioning. Enzyme systems of mammals and birds are most efficient only withi

发表于:2018-12-01 / 阅读(201) / 评论(0) 分类 新东方背诵文选

[00:00.00] MODULE 3 STATIONERY [00:05.47]Unit 7 Where's My pencil? [00:11.63]VOCABULARY [00:14.87]where where's=where is pencil it [00:21.40]什么地方;哪里 是在哪里 铅笔 它 [00:27.94]on desk no bed [00:32.96]在...的上面 书桌 不;不是

发表于:2018-12-13 / 阅读(96) / 评论(0) 分类 广州小学三年级 (上) 课本

[00:00.00] MODULE 3 STATIONERY [00:04.99]UNIT 7 Where is My Pencil? [00:10.63]Words and Expressions [00:14.79]Where [00:16.76]什么地方 [00:18.73]where's = where is [00:22.36]...是在什么地方 [00:25.99]pencil [00:27.98]铅笔 [00:29.96]it [00

发表于:2018-12-13 / 阅读(121) / 评论(0) 分类 广州小学三年级 (上) (学生用书)

[00:01.08]Happy birthday,Lingling.生日快乐,玲玲。 [00:03.62]Here's your gift.这是你的礼物。 [00:05.41]Oh,you remembered!哦,你记得! [00:07.70]What a surprise!真是个惊喜啊! [00:09.62]You can open it!你可以打开它! [00:10.

发表于:2018-12-13 / 阅读(54) / 评论(0) 分类 外研社新标准初中英语八年级上(2013版)

[00:00.00]Hey,boys!嘿,男孩们! [00:02.02]Hi,Betty.嗨,贝蒂。 [00:03.39]Hi,Lingling.嗨,玲玲。 [00:04.69]Where are you going?你要去哪里? [00:06.11]We're going to the park to skate.我们去公园滑冰。 [00:08.01]There's thick ice

发表于:2019-01-09 / 阅读(94) / 评论(0) 分类 外研社新标准初中英语八年级上(2013版)

Some bacteria have adapted to super cold environments for millions of years. And scientists have isolated some of the essential genes that allow bacteria to tolerate their harsh living conditionsbecause these same genes might help in the creation of

发表于:2019-01-11 / 阅读(75) / 评论(0) 分类 英语杂谈