题目

阅读下面短文，在空白处填入一个适当的内容(1个单词)或用括号内所给单词的正确形式填空(1-3个单词)或根据音标填词。 This summer vacation, I took a trip to Weishui.It is in the southwestern part of Songzi City. It is really a very great place beautiful mountains, a clean reservoir (水库) and kind people. Trees and flowers are everywhere. Every yearlots of (visit) come here to enjoythemselves. Maybe you know Chaibuxi, Wufeng County(县). There are all kinds strange stones. Some of the smaller stones look like beautifulgirls, and the (big) stones loo下列物质中，在核糖体上合成的是                                   (  )  ①肾上腺素 ②突触后膜上的受体 ③淀粉 ④唾液淀粉酶 ⑤纤维素 ⑥胰高血糖素 A．①③④        B．②③⑤       C．②④⑥       D．①④⑤