图画;绘图——青夏教育精英家教网—

有如下图所示的探究性实验装置共6个，6个装置中分别加入葡萄糖饱和溶液和两个凝胶珠，实验开始时，小液滴都在c点（刻度管足够长，瓶内氧气充足）。6个装置分别置于0℃、15℃、25℃、35℃、45℃、55℃温度下10分钟后记录各个装置中的小液滴位置，并描绘出坐标曲线图（如甲曲线）

（1）实验的目的是，自变量是。
（2）瓶中氢氧化钠溶液的作用是，小液滴移动的距离表示。
（3）实践上如果通过固定化醋酸菌生产醋酸，那么制备的凝胶珠大小与固定化酵母菌生产酒精相比，应该注意什么问题?为什么?
（4）如果制备固定化醋酸菌细胞实验中，海藻酸钠浓度过低，请在坐标系中画出实验开始10分钟后的曲线乙。
（5）工业生产中利用固定化细胞技术进行生产，从哪些方面可以达到延长利用固定化细胞的时间（至少两点）? 查看习题详情和答案>>

看图填词，根据所绘图画在下面短文的每个空白处填写一个适当的单词，完成短文.

　　Peter and John are classmates. One day they had an English exam. Peter got a full mark but John didn't (1) it. Peter became so happy (2) he began to play all day long.

　　John made up his mind to (3) (4) with the other students in his class. He corrected all his mistakes (5) the help of the teacher. He also studied hard at home. In the evening ,when Peter was (6) TV, John was working hard at English. A month later, they had (7) English exam. To their (8) , John got a full mark while Peter failed the exam.

(1)______	(2)______	(3)______	(4)______	(5)______
(6)______	(7)______	(8)______

查看习题详情和答案>>

看图填词，根据所绘图画在下面短文的每个空白处填写一个适当的单词，完成短文.

　　Peter and John are classmates. One day they had an English exam. Peter got a full mark but John didn't (1) it. Peter became so happy (2) he began to play all day long.

　　John made up his mind to (3) (4) with the other students in his class. He corrected all his mistakes (5) the help of the teacher. He also studied hard at home. In the evening ,when Peter was (6) TV, John was working hard at English. A month later, they had (7) English exam. To their (8) , John got a full mark while Peter failed the exam.