渔业资源是海洋资源的重要组成部分，我国根据不同海域的具体情况规定了相应的休渔期。

A、B、C、D、E分别是稀盐酸、氢氧化钙溶液、水、氧化铜和二氧化碳中的一种物质．通常情况下A为固体。右图用圆和方框表示这五种物质，用两圆相切表示两种物质可以发生化学反应．用“→”表示一种物质能转化为另一种物质．请回答下列问题：

⑴在图中标出五种物质的化学式；

⑵B与C反应的化学方程式______________________________；

⑶A与足量B反应的实验现象为                         。

读东南亚局部地区示意图，完成1—2题。

1、图中甲半岛的地形特征是[ ]

A、平原为主，地势平坦

B、高原为主，地面崎岖

C、山河相间，纵列分布

D、地形复杂，中高周低

2、该半岛人口和大城市主要分布河流沿岸及河口三角洲地区，主要原因是：①水流湍急，水能丰富、②地形平坦、③水源充足、④交通便利 [ ]

A、①②

B、②③

C、①②③

D、②③④

   I had never seen sand dunes（沙丘）before. If you go to the seaside in Britain, you may see some small hills of sand, but nothing very impressive. Of course, Africa is home to many beautiful “sandscapes”, but I was in China, so I went to Dunhuang.

I had spent my first day looking at the beautiful Mogao caves. Now I wanted to experience something very different.

I have been walking in Asia, Europe and America, but nothing prepared me for walking over hills of sand. Whenever I took a step up a hill, my feet would sink into the sand and move backwards. Sometimes it seemed as if I were moving in the wrong direction.

I wanted to see the sunset so I had to climb to the top of the highest sand dune. The sun was beating down upon my back as I walked slowly over the sand. Some plants had managed to survive in the dry ground but not many.

As I climbed higher, the hills of sand became steeper and my feet started to slip further backwards. I ended up with my hands and knees, crawling (爬行)upwards through the top. I just let go if I would fall the way down. But I refused to give up: inch by inch, I made my way to the top of the sand dune.

When I got there I was amazed by what I saw. The sand formed a very sharp point, just like a knife-edge. One side of the dune was bathed in sunshine, the other covered by shade. As I looked into the distance, the same pattern was repeated on all of the hilltops, and the difference between dark and light was beautiful.

As the sun began to sink, the shadows grew longer and the light became warm and orange. The wind had come to life and sand was blown against my legs as I walked along the dunes. Soon it was getting dark and I could only just make out the line of footprints that marked my journey to the top of the hill. I slowly made my way down to the bottom, my path lit by the dying sun.

65 The author probably went to climb the sand dunes __________ after he arrived at Dunhuang.

A. on the afternoon of the first day       B. on the afternoon of the second day

C. on the evening of the second day     D. on the evening of the first day

66. Which of the following statements is NOT true?

A. Africa has many beautiful sand dunes.

B. The author could see nothing but his own footprints on his way back.

C. The author had seen some kinds of sand dunes before he visited Dunhuang

D. What attracted the author most was that the sand formed a very sharp point.

67. The author got to the top of the highest hill of sand _____________.

A. on his hands and knees all the way

B. with falls to the bottom many times

C. on his hands and knees in the last leg (一段旅程)

D. with a few rests all the way                

68. The author mainly wants to tell readers about_____________.

A. the beautiful sunset         B. his experience of climbing the sand hills

C. the joy of traveling in nature  D. the difficulty of climbing the sand dunes

急性炎症性脱髓鞘性多发性神经病出现痰多、发绀和呼吸肌麻痹时，应及早（）

A.注射呼吸中枢兴奋剂

B.吸痰

C.吸氧

D.气管切开

E.使用支气管扩张气雾剂

单体电池浮充状态下的浮充电压范围应在2.18V-2.28V之间，连续二个维护周期超出范围，判为单体故障，应实施充放电维护，不能恢复的，应予以更换。