昌都卡若遗址是我们目前发现最早的（）的遗址。A、旧石器时代 B、中石器时代 C、新时期时

对于a=1，b=2，若进行c=a，a=b，b=c的赋值变换，则a，b，c的值为（　　）

A．2，1，1

B．1，2，1

C．1，1，2

D．2，1，2

Some years ago，writing in my diary used to be a usual activity.I would return from school and spend the expected half hour recording the day’s events，feelings，and impressions in my little blue diary.I did not really need to express my emotions by way of words，but I gained a certain satisfaction from seeing my experiences forever recorded on paper.After all，isn’t accumulating memories a way of preserving the past?

When I was thirteen years old，I went on a long journey on foot in a great valley，well­equipped with pens，a diary，and a camera.During the trip，I was busy recording every incident，name and place I came across.I felt proud to be spending my time productively，dutifully preserving for future generations a detailed description of my travels.On my last night there，I wandered out of my tent，diary in hand.The sky was clear and lit by the glare of the moon，and the walls of the valley looked threatening behind their screen of shadows.I automatically took out my pen...

At that point，I understood that nothing I wrote could ever match or replace the few seconds I allowed myself to experience the dramatic beauty of the valley.All I remembered of the previous few days were the dull characterizations I had set down in my diary.

Now，I only write in my diary when I need to write down a special thought or feeling.I still love to record ideas and quotations that strike me in books，or observations that are particularly meaningful.I take pictures，but not very often－only of objects I find really beautiful.I’m no longer blindly satisfied with having something to remember when I grow old.I realize that life will simply pass me by if I stay behind the camera，busy preserving the present so as to live it in the future.

I don’t want to wake up one day and have nothing but a pile of pictures and notes.Maybe I won’t have as many exact representations of people and places；maybe I’ll forget certain facts，but at least the experiences will always remain inside me.I don’t live to make memories－I just live，and the memories form themselves.

小题1:Before the age of thirteen，the author regarded keeping a diary as a way of________.

A．observing her school routine

B．expressing her satisfaction

C．impressing her classmates

D．preserving her history小题2:What caused a change in the author’s understanding of keeping a diary?

A．A dull night on the journey.

B．The beauty of the great valley.

C．A striking quotation from a book.

D．Her concerns for future generations.小题3:What does the author put in her diary now?

A．Notes and beautiful pictures.

B．Special thoughts and feelings.

C．Detailed accounts of daily activities.

D．Descriptions of unforgettable events.小题4:The author comes to realize that to live a meaningful life is________.

A．to experience it

B．to live the present in the future

C．to make memories

D．to give accurate representations of it

商朝最后一个王是（）。

A、汤

B、契

C、盘庚

D、纣王

行皮肤活检术时，除哪项外，均是应注意事项：

A．选择瘢痕不易形成或看见部位

B．常规消毒，注意擦去鳞屑和痂皮

C．局部麻醉

D．防止麻醉过敏反应发生，做好急救准备

E．切下组织应立即放入10%福尔马林液内固定

某地环境监测部门对该地某项目进行了环保验收监测。该项目位于环境空气质量三类功能区和二氧化硫污染控制区，锅炉年运行小时按8000h，当地政府对该项目锅炉下达的废气污染物总量控制指标为SO₂27t/a，烟尘19t/a。锅炉环保验收监测结果如下表。

烟囱高度/m	25
烟气量/(m3/h)	11500
锅炉制定蒸发量/(t/h)	7
过量空气系数	3.2
SO2浓度/(mg/m2)	除尘器前	320
	除尘器后	310
烟尘浓度/(mg/m2)	除尘器前	1200
	除尘器后	200

已知：《锅炉大气污染物排放标准》(GBl3271—2001)中，锅炉过量空气系数为1.8，三类区锅炉烟尘最高允许排放浓度：Ⅰ时段为350mg/m³，Ⅱ时段为 250mg/m³；SO₂最高允许排放浓度：Ⅰ时段为1200mg/m³，Ⅱ时段为900mg/m³。

锅炉房装机总容量/(t/h)	＜1	1～＜2	2～＜4	4～＜10	10～＜20
烟囱最低允许高度/m	20	25	30	35	40

SO₂排放量和烟尘排放量是否超过当地政府下达的总量控制指标( )

A．SO₂排放量和烟尘排放量均未超过
B．SO₂排放量和烟尘排放量均超过
C．SO₂排放量超过，烟尘排放量未超过
D．SO₂排放量未超过，烟尘排放量超过