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Howes was spending a day at the Ocean Beach in New Zealand. His daughter Niccy and her two friends, Helen and Karina, were with him. They were swimming over 300 feet out to sea when they saw six dolphins (海豚) coming to them.
“We couldn’t believe our eyes,” Mr. Howes said. “They kept moving in a circle and we didn’t know why.” Then, one dolphin swam to Mr. Howes and Helen, who were about 65 feet away from the other two. It pushed Mr. Howes and Helen a lot. Mr. Howes felt that the dolphin wanted to bring them together.
“Suddenly I saw another fish swimming to me and Helen,” said Mr. Howes. “It was in fact a great white shark (鲨鱼). It was only about 15 feet away from us,” he said. Then he knew what the dolphins were doing! They were trying to save them from the shark. The shark then went to the other two girls. Mr. Howes was really scared. One of the girls was his daughter.
The dolphins pushed the four swimmers back together and placed themselves between the swimmers and the shark. About 40 minutes later, the shark finally lost interest and swam away. The four swimmers were finally out of danger.
For Howes, it was a day he would never forget. He couldn’t thank his animal friends enough.
1．How many persons went swimming with Howes?| A．2. | B．3. | C．4. | D．5. |
| A．Playing happily. | B．Looking for food. | C．Trying to help them. | D．Fighting with a shark. |
| A．He was all alone. | B．He was far out in the sea. |
| C．His daughter was missing. | D．The two girls were in danger. |
| A．bad to the dolphins | B．sorry for the dolphins |
| C．thankful for the dolphins | D．worried about the dolphins |
同类型试题
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
