题目

4.2596保留整数是（_____），精确到千分位是（_____），精确到百分位是（_____）。 答案：【答案】4 4.260 4.26 【解析】略It looks like a scene from the thriller movie Jaws，but these photos of a huge shark swimming with swimmers were in fact taken in Britain. The amazing pictures，which showed that the basking shark (姥鲨) was swimming friendly with swimmers，were taken at Porthcurno beach，Cornwall，where the basking shark was swimming just yards off shore. The single 14?foot giant was feeding in the shallow waters off the scenic area，and quickly became curious about the swimmers and surfers sharing the water. Though it came within touching distance，the swimmers and surfers were in no danger. The large sharks are plankton (浮游生物) feeders－unlike the man－eating Great White from Jaws. Beach-goer Rachel Hosken，who took the pictures，said that several basking sharks had been seen in the area.“It is one of the few I have ever seen around this year and it was great to see，” she said excitedly.“There are usually more of them by now，but for some reason there are fewer around than normal at this time of year. I think more have been spotted in deeper waters，but the particular one in the pictures seems to have taken a liking to this spot. I have seen it a few times.” Known as the gentle giant of the sea，the basking shark is the second largest fish in the sea，only weighing lighter than the whale shark. They can grow to over 36 feet (11 meters) and weigh up to seven tons (7,000 kilograms) and feed on a diet of plankton and small fish. Basking sharks normally begin to appear in May and June. 1.In the pictures taken by Rachel Hosken，we can infer that ________. A．swimmers and surfers were escaping B．surfers were trying to frighten the basking shark C．the basking shark was swimming far from swimmers D．swimmers were not frightened by the basking shark 2.Why didn’t the basking shark attack the swimmers or surfers? A．Because it was not hungry. B．Because it was too far from them. C．Because it isn’t a man-eating shark. D．Because it enjoyed swimming with them. 3.From what Rachel Hosken said we know that ________. A．most basking sharks swim deep in the sea B．this basking shark has often appeared in that area C．many basking sharks have been killed in that area D．the basking shark doesn’t like being with other basking sharks 4.What’s the best title for this passage? A．A giant basking shark appeared in Cornwall，Britain. B．A giant basking shark tried to please the British people. C．Swimmers and surfers were frightened by a giant basking shark. D．Brave swimmers swam together with a giant basking shark.