How did the calf feel about the mother elephant’s roaring？
A. It was a great comfort. B. It was a sign of danger.
C. It was a call for help. D. It was a musical note.
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A. It was a great comfort. B. It was a sign of danger.
C. It was a call for help. D. It was a musical note.
A
I suddenly heard an elephant crying as though frightened. Looking down, I immediately recognized that something was wrong, and ran down to the edge of the near bank. There I saw Ma Shwe with her three-month-old calf struggling in the fast-rising water, and it was a life-and-death struggle. Her calf was floating and screaming with fear. Ma Shwe was as near to the far bank as she could get, holding her whole body against the rushing water, and keeping the calf pressed against her huge body. Every now and then the rushing water would sweep the calf away.
There was a sudden rise in the water and the calf was washed clean over the mother’s body and was gone. Ma Shwe turned quickly to reach it and pressed the calf with her head and trunk(象鼻) against the rocky bank. Then with a huge effort, she picked it up in her trunk and tried until she was able to place it on a narrow shelf of rock.
Just at this moment she fell back into the river. If she were carried down, it would be certain death. I knew, as well as she did, that there was one spot(地点) where she could get up the bank, but it was on the other side from where she had put her calf.
While I was wondering what I could do next, I heard the sound of a mother’s love. Ma Shwe had crossed the river and got up the bank and was making her way back as fast as she could, roaring (吼叫) all the time, but to her calf it was music.
56. The moment the author got down to the river bank he saw _____,
A. the calf was about to fall into the river
B. Ma Shwe was placing the calf on the rock
C. the calf was washed away by the rising water
D. Ma Shwe was holding the calf against the rushing water
A. Tiring. B. Expensive. C. Enjoyable. D. Quick.
物质
X
Y
Z
初始浓度/mol·L-1
0.1
0.2
0
平衡浓度/mol·L-1
0.05
0.05
0.1
下列说法错误的是：
A．反应达到平衡时，X的转化率为50％
B．反应可表示为X+3Y2Z，其平衡常数为1600
C．增大压强使平衡向生成Z的方向移动，平衡常数增大
D．改变温度可以改变此反应的平衡常数
A. Monday and Tuesday. B. Tuesday and Wednesday.
C. Wednesday and Thursday. D. Monday and Wednesday.