血糖平衡对机体生命活动具有重要作用．如图是血糖调控模式图，据图回答：

（1）当机体处于低血糖状态时，如果机体通过途径①→②→③使血糖水平恢复正常，其主要机理是：

____ 分泌增多，促进了____  分解成葡萄糖，使血糖水平升高．

（2）胰腺中调控血糖水平的主要激素的化学本质是蛋白质或多肽，它们的合成和加工过程需要____ 等细胞器直接参与．激素合成时所需的能量，主要由细胞呼吸产生的ATP直接提供．

（3）人体血糖平衡调节中枢在____ ，人体维持血糖相对平衡的调节方式是____ ．

（4）糖尿病是一种常见病，且发病率有逐年增加的趋势，以致发达国家把它列为第3号“杀手”．目前，对糖尿病的治疗，大多采用激素疗法，所用激素为____ ，由____ 细胞分泌．

（5）治疗糖尿病所用激素现在基本采用基因工程技术生产，过去主要是从动物的____ 中提取，数量有限．

进入初中，你来到一个新集体，同学对新集体的认识不正确的是 （   ）

阅读下面短文, 按照句子结构的语法性和上下文连贯的要求, 在空格处填入一个适当的词或使用括号中词语的正确形式填空。

    Itzhak Perlman is ____ famous violinist. He was born ____ 1945. He once gave a concert in New York City. Getting on stage was difficult for him ____ he is disabled. The audience sat ____ (quiet) while he made his way across the stage to ____ (he) chair. Then he picked up the violin, ____ (put) it under his chin (下巴) and started to play. But this time, when he finished the ____ (one) part, one of the ____ (string) on his violin broke. ____, he continued to ____ (play) the music. The music he played with three strings sounded even more wonderful than it was played with four strings.