五味子保肝的主要药效成分是（） A.香豆素 B.木脂素 C.蒽醌 D.生物碱 E.黄

Sometimes there doesn’t seem to be enough rain. Other times there is too much. Maybe thereisn’t a lot we can do to control the rain, but there is a lot we can do to reduce problems caused bydifferent rainfall patterns.

A new development at the London Wetland Centre in Barnes solves the problems of managingwater with a “Rain Garden”. We are likely to be hearing about it a lot more often over the next fewyears. The idea is that the garden owner can store rainwater and use it in dry periods. They canreduce the problems caused by extra rain this way.

One of the key problems that the rain garden tries to deal with is the problem caused by toomuch water in the street. In a natural environment, a lot of rainwater is sent back into the air byplants. Much is also absorbed deep into the ground, and flows into streams and rivers. What happensin city environments can be completely different —— a large amount of rainwater flows straight offthe hard surfaces of roofs and roads. The harder the rain, the less likely it will be absorbed into theground —— floods are the result. Rainwater running off roads is often polluted.

The rain garden deals with living plants rather than hard surfaces. Plants are designed to holdwater and release it slowly, either into the ground, to be absorbed by plant roots (and so eventuallyback up into the atmosphere) or to go down into the water table. Not only does the rain gardenreduce the amount of water that flows onto the street, but it helps to clean it because plants are very goodat breaking down pollutants(污染物).

小题1:What’s the main idea of the first paragraph?

A．Explaining why there is a lack of rain at times.

B．Introducing several different patterns of rainfall.

C．Telling us how to avoid problems caused by rain.

D．Giving the idea that there are ways to manage rain water.小题2:According to the second paragraph, “Rain Gardens" are likely to _____.

A．harm the environment in the short run

B．become popular over the next few years

C．be turned down by most new developments

D．be too expensive for common people to accept小题3:We can learn from the third paragraph that _____.

A．floods are often the results of small rains

B．a heavy rain is less difficult for plants to absorb

C．the rain garden helps send rainwater back into the air

D．larger amounts of rainwater flow straight off in city environments小题4:According to the last paragraph, what does the rain garden help to clean?

A．The plants

B．The ground.

C．The water.

D．The street.

在下列物质中，锰元素化合价最高的是（  ）

A．MnO₂

B．KMnO₄

C．MnCl₂

D．K₂MnO₄

女，6岁。因高热、头痛、精神萎糜l天，于2月5日入院。体检：体温39.5℃，血压70/40mmHg，胸部及四肢皮肤见多处大小不等的瘀点、瘀斑，颈软，心、肺无异常发现。外周血白细胞28.2×10⁹/L，中性粒细胞0.87，淋巴细胞0.13。诊断首先考虑为（）。

A．流行性出血热

B．流行性脑脊髓膜炎

C．流行性乙型脑炎

D．败血症

E．过敏性紫癜

关于窦性心动过速特征的描述，不正确的是（）

A.PR间期、QT间期可相应缩短

B.常见于运动、发热、甲亢、贫血等

C.不应有ST-T的变化

D.心率>100次／分

E.P波为窦性

设在工程中有一个标准模块，其中定义了如下记录类型：
Type Books
Name As String *10
TelNum As String*20
End Type
在窗体上画一个名为Command1的命令按钮，要求当执行事件过程Command1_ Click时，在顺序文件 Person.txt中写入一条记录。下列能够完成该操作的事件过程是______。

A．Private Sub Command1_ Click()
Dim x As Books
Open "C：\Person. txt" for Output As #1
x. Name=InputBox(“输入姓名”)
x. TelNum=InPutBox(“输入电话号码”)
Write #1，x.Name，x.TelNum
Close #1
End Sub

B．Private Sub Command1_ Click()
Dim x As Books
Open "c：\Person. txt" for Input As #1
x.Name=InputBox(“输入姓名”)
x. TelNum=InputBox(“输入电话号码”)
Print #1，x. Name，x. TelNum
Close #1
End Sub

C．Private Sub Command1_ Click()
Dim x As Books
Open "c：\Person. txt" for Output As #1
x. Name=InputBox(“输入姓名”)
x. TelNum= InputBox(“输入电话号码”)
Write #1，x
Close #1
End Sub

D．Private Sub Command1_ Click()
Dim x As Books
Open "c：\Person. txt" for Input As #1
x. Name= InputBox(“输入姓名”)
x.TelNum=InputBox(“输入电话号码”)
Print #1，Name，TeINum
Close #1
End Sub