摘要:9. C 该超市免费购物者每个星期只有一位.一年应当有52位.

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On Sunday morning, I usually get up very late. I wash my face, and then go out to do morning exercises. It is about 8: 40 am. After I eat my    , I often go to a shopping centre   my mother. The shopping centre is   our home, so we walk there. It takes us about 20 minutes to get there. The shopping centre has a good   . It is called“蓝莓购物中心”in Chinese. It doesn’t have an English name. Can you   it in English? It is new and big. There are many things there, such as TVs, fridges, computers, clothes, food   drinks. There are many     every day. There are men and women, the old and the    .     do many people come here to buy things? Do you know? Let me tell you. The workers there are always nice and friendly. The things there are usually good but not   . If you come to my home, I can take you there and have a look.

1.A. breakfast             B. lunch              C. supper           D. dinner

2.A. for                        B. to                    C. of           D. with

3.A. near                     B. not far            C. at                    D. far from

4.A. flower            B. place               C. name              D. room

5.A. say                        B. speak             C. tell             D. talk

6.A. but                       B. with                C. or     D. and

7.A. students              B. people     C. children          D. teachers

8.A. tall                        B. short              C. young             D. small

9.A. What          B. Who               C. Why               D. When

10.A. expensive         B. cheap             C. big                  D. new

 

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为探究植物细胞膜的透性,某同学以红甜菜根(液泡中含有花青素)进行下列实验:
A.将不同切片放在不同温度的蒸馏水中处理1分钟后取出。
B.再分别放在清水中浸泡1小时而获得不同的切片浸出液。
C.测量这些溶液的花青素吸光度,得结果如下图。

请回答以下问题:
(1)上述实验操作步骤的叙述存在着一个明显的不足,没有遵循实验设计的    原则。请你对上述实验中的不准确的操作重新进行叙述:            。
(2)由上图中的曲线你可以得出的结论是                    。
(3)已知物质A能促进细胞膜上载体的活性。有人认为:经过不同温度的处理是影响了细胞膜上运载花青素的载体的活性。请你借助上述材料设计实验证明该观点是否正确。
材料用具:略。
实验步骤:
①                                                                   ;
②                                                                  ;
③                                                                   。
(2)预测结果及结论:
①                                                                   ;
②                                                                   ;
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