注意从各方面考虑问题.突破难点.注意复查.——青夏教育精英家教网—

摘要：注意从各方面考虑问题.突破难点.注意复查.

网址：http://m.1010jiajiao.com/timu_id_2329962[举报]

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>>

（一）阅读《人民解放军百万大军横渡长江》（节选），完成5—7题。（14分）
和中路军所遇敌情一样，我西路军当面之敌亦纷纷溃退，毫无斗志，我军所遇之抵抗，甚为微弱。此种情况，一方面由于人民解放军英勇善战，锐不可当；另一方面，这和国民党反动派拒绝签订和平协定，有很大关系。国民党的广大官兵一致希望和平，不想再打了，听见南京拒绝和平，都很泄气。战犯汤恩伯21日到芜湖督战，不起丝毫作用。汤恩伯认为南京江阴段防线是很巩固的，弱点只存在于南京九江一线。不料正是汤恩伯到芜湖的那一天，东面防线又被我军突破了。
【小题1】．这段文字写的主要内容是什么？（4分）
【小题2】．加点的“不料”一词在文中表现了我军的（不超过4个字）；对敌人来说，这个词具有强烈的＿＿＿＿＿＿＿意味。（4分）
【小题3】．新闻一般以记叙为主，“用事实说话”，但可以穿插议论。本文从两方面议论了敌人毫无斗志的原因，这两个方面各是什么？（6分）
（1）__________________________________________________________________。
（2）__________________________________________________________________。查看习题详情和答案>>

阅读下面两篇短文，从各小段所给的四个选项中选出能回答所提问题或完成所给句子的最佳答案。

Let’s meet the Johnson’s family. Mr.Johnson is a manageer(经理)in a big company(公司). He works very hard. He is very busy. He makes much money.But he is always tired(劳累的). He says to his friend,“I want to be a reporter because I like talking to people.”

His wife Mrs. Johonson is a good doctor .She works in children’ Hospital. She likes Chinese medicine(中医) very much.

The Johnsons have a daughter called Salina.She is a teacher of French. She always tells her students many interesting stories.They are good friends. They like her.

1.There are ______ people in the Johnsons.

A．four

B．three

C．two

D．five

2.Mr.Johnson is a ______.

A．worker

B．doctor

C．reporter

D．manager

3.Mr.Johnson ______.

A．can make much money	B．is very tired
C．wants to be a reporter	D．A,B and C

4.How does Mrs.Johnson like Chiese medicine?

A．She likes it a lot.	B．She likes it a little.
C．She does n’t like it at all.	D．She doesn’t like it.

5.What does Salina do?

A．A doctor

B．A student

C．A teacher

D．A reporter

查看习题详情和答案>>

阅读下面两篇短文，从各小段所给的四个选项中选出能回答所提问题或完成所给句子的最佳答案。
Let’s meet the Johnson’s family. Mr.Johnson is a manageer(经理)in a big company(公司). He works very hard. He is very busy. He makes much money.But he is always tired(劳累的). He says to his friend,“I want to be a reporter because I like talking to people.”
His wife Mrs. Johonson is a good doctor .She works in children’ Hospital. She likes Chinese medicine(中医) very much.
The Johnsons have a daughter called Salina.She is a teacher of French. She always tells her students many interesting stories.They are good friends. They like her.
【小题1】There are ______ people in the Johnsons.