3. For what purpose did the author insert Paragraph 19 and 20 in the story?
A. To tell the reader how destructive Hurricane Camille was.
B. To describe what NHC had done with Hurricane Camille.
C. To provide evidence of the seriousness of natural disasters.
D. To build a suspense about what would happen to the family.
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4. What can we learn from Paragraph 35 about the dog and cat returning alive and hungry?
A. They were as lucky as their masters were.
B. The family was less seriously damaged.
C. God helps those who help themselves.
D. Animals better survive natural disasters.
弛张热一天内温差为
A. 1℃以上
B. 2℃以上
C. 3℃以上
D. 1℃以下
发热最常见的原因是
A. 无菌性坏死物质吸收
B. 变态反应
C. 自主神经功能紊乱
D. 病原体感染
E. 体温调节中枢功能失调