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实验步骤如下：①切取一小块金属钠，用滤纸完全吸干煤油，再除去表面的氧化层，放进干燥的E中；
②打开分液漏斗的活塞，使B中的反应进行一段时间后，再点燃E处的酒精灯。
实验现象如下：钠在充满C02气体的玻璃管中剧烈燃烧起来，产生大量的白烟；玻璃管中有黑色物质生成；待玻璃管冷却后，管壁上附着一层白色物质。
请回答下列问题：
（1）C中盛放的试剂是 ，作用是 。D中盛放的试剂是 ，作用是 。
（2）B中的反应进行一段时间后，再点燃E处的酒精灯的目的是 。
（3）该同学将白色物质和黑色物质分别溶于水，发现黑色物质不溶于水，白色物质能溶于水。由此，该同学得出结论，该黑色物质是Na与C02反应生成的碳单质，则其他生成物还应该有 。
（4）请设计一实验方案验证玻璃管内Na与C02反应生成的白色物质的成分，并写出实验步骤、现象和结论 。
（5）若先点燃E处的酒精灯，再打开分液漏斗的活塞，写出此时玻璃管E中可能发生的反应的化学方程式 。 查看习题详情和答案>>
(1)A萌发时所需的外界环境条件是___________________(写出其中一条）。
(2)B的主要部分是_____________。
(3)C中的_____________是裸子植物所没有的。
(4)D在完成_____________过程后，子房中的胚珠发育成 。
(5) 假设图中C的颜色为红色，已知R是红色的显性基因，r为黄色的隐性基因，请你写出C果实的可能基因___________。 查看习题详情和答案>>
(Megan and Kyle are talking before class begins.)
Megan: Hey, Kyle, are you ready for the big test today? I studied that list of words and the definitions(释义) for two hours last night.
Kyle: Oh, but I didn’t study at all. I just wrote all the answers on the palm(手掌) of my hand, see?
Megan: Kyle! You can’t do that! That’s cheating(作弊)！
Kyle: Hey, don’t worry. I won’t be caught. Mrs King will never know.
(Mrs King comes in and passes out the test papers.)
Mrs King: Okay, no more talking. You may begin.
(Kyle looks st his hand when the teacher isn’t looking.)
Joe: (raising his hand) Mrs King, may I have a drink? I have the hiccups(打嗝).
Mrs King: Yes, you may.
Kyle: (raising his hand) Mrs King, may I get a drink, too?
Mrs King: Kyle, what is that on your hand? I think you had better come to my desk.
Kyle: Oh no…
(After this, Kyle realizes his mistake and never cheats in exams again.)
【小题1】根据Megan and Kyle are talking before class begins（在上课开始前）.及下文描述，可知这个故事可能发生在教室里。A
【小题2】根据Kyle: Oh, but I didn’t study at all. I just wrote all the answers on the palm(手掌) of my hand, see?可知他把答案写在了手上，选项中没有正确答案。
【小题3】 Where did the story possibly take place?
| A．In the classroom. |
| B．In the library. |
| C．On the playground. |
| D．In the reading room. |
| A．On his hand. |
| B．In his notebook. |
| C．Megan told his classmates everything. |
| D．Joe told Mrs King about Kyle’s cheating. |
(Megan and Kyle are talking before class begins.)
Megan: Hey, Kyle, are you ready for the big test today? I studied that list of words and the definitions(释义) for two hours last night.
Kyle: Oh, but I didn’t study at all. I just wrote all the answers on the palm(手掌) of my hand, see?
Megan: Kyle! You can’t do that! That’s cheating(作弊)！
Kyle: Hey, don’t worry. I won’t be caught. Mrs King will never know.
(Mrs King comes in and passes out the test papers.)
Mrs King: Okay, no more talking. You may begin.
(Kyle looks st his hand when the teacher isn’t looking.)
Joe: (raising his hand) Mrs King, may I have a drink? I have the hiccups(打嗝).
Mrs King: Yes, you may.
Kyle: (raising his hand) Mrs King, may I get a drink, too?
Mrs King: Kyle, what is that on your hand? I think you had better come to my desk.
Kyle: Oh no…
(After this, Kyle realizes his mistake and never cheats in exams again.)
小题1:根据Megan and Kyle are talking before class begins（在上课开始前）.及下文描述，可知这个故事可能发生在教室里。A
小题2:根据Kyle: Oh, but I didn’t study at all. I just wrote all the answers on the palm(手掌) of my hand, see?可知他把答案写在了手上，选项中没有正确答案。
小题3: Where did the story possibly take place?
| A．In the classroom. |
| B．In the library. |
| C．On the playground. |
| D．In the reading room. |
| A．On his hand. |
| B．In his notebook. |
| C．Megan told his classmates everything. |
| D．Joe told Mrs King about Kyle’s cheating. |