【简答题】体内两种主要的环核苷酸是 、 ,在细胞内起第二信使的作用。
【简答题】玲玲是小班的一位孩子,她在幼儿园的时候小便的时候,总有几个男孩子喜欢看女孩子小便还捂嘴笑。她对男孩子的行为很不解,就问老师:“他们为什么总盯着我们看?他们笑什么呢?” 如果你是老师,你会如何引导玲玲和班上的孩子呢?
【单选题】_______Susan gets onto the top of a tall building, she feels very much frightened.
【单选题】______Susan gets onto the top of a tall building, she will feel very much frightened.
【单选题】Susan never gets upset when she has to wait in line .She is very ——.
【单选题】__________ Susan gets onto the top of a tall building, she will feel very much frightened.