试论曹植诗歌的风格及其成因。

阅读表达。

     Julia Hill, an American woman, was born in 1974. She was 23 years old when she discovered that a

company wanted to cut down part of a forest in California. In the forest there were lots of redwood trees. One of the trees was 70 metres tall and l ,000 years old.

     Julia wasn't happy about this. She traveled to California and climbed up the tree. "If I sit in the tree, "

she said," the company can't cut it down. "  At the beginning,Julia planned to stay in the tree for two

weeks. She lived in a small treehouse and her friends cooked food for her every day. She used her

mobile phone to talk to her family and to news reporters. She stayed in the tree day and night.

     In the end, she was successful. The company agreed not to cutdown the redwood. Finally, after two

years and eight days in the tree, Julia Hill climbed down and walked on the ground again. She and her

friends were very happy.

阅读短文，回答下列问题。

1. What nationality is Julia Hill?

   ________________________________________________________________________

2. How tall and how old was the tree Julia Hill stayed in?

   ________________________________________________________________________

3. How did she keep in touch with others while staying high up in the tree?

   ________________________________________________________________________

4. Why did Julia Hill stay in the tree?

   ________________________________________________________________________

已知四种强电解质溶液，分别含有下列阴、阳离子中的各一种，并且互不重复：NH₄^＋、Ba^2＋、Na^＋、H^＋、SO₄^2－、NO₃^－、OH^－、SO₃^2－。将这四种溶液分别标记为A、B、C、D，进行如下实验。

①在A或D中滴入C，均有沉淀生成；

②D和B反应生成的气体能被A吸收；

③A和D反应生成的气体能被B吸收，也可使溴水褪色。

试回答下列问题：

(1)D的化学式是________，判断理由是___________________________________________。

(2)写出其余几种物质的化学式：A________，B________，C________。

(3)写出实验②中有关反应的离子方程式_______________________________。

(4)写出③中生成的气体与溴水反应的离子方程式_______________________。

某16层现浇钢筋混凝土框架-剪力墙结构，房屋高度为64m，抗震设防烈度为7度，丙类建筑，场地类别Ⅱ类。在规定的水平力作用下，结构底层剪力墙部分承受的地震倾覆力矩为结构总地震倾覆力矩的92%。下列关于框架、剪力墙抗震等级的确定何项正确（）。

A.框架三级、剪力墙三级

B.框架二级、剪力墙二级

C.框架三级、剪力墙二级

D.框架二级、剪力墙三级

对大鼠进行吸入麻醉应选（）

A．乙醚

B．利多卡因

C．普鲁卡因

D．戊巴比妥钠

E．氯仿

纯阳