2019年8月3日托福听力真题原文+题目+答案+mp3下载：hydrophone

2019年8月3日托福听力真题原文+题目+答案+mp3下载：hydrophone

Listen to part of a lecture in a meteorology class.

Professor：OK. It's important to measure a hurricane's intensity before it reaches land because it can help save lives and avoid the enormous costs of an unnecessary evacuation. But the factors leading to a hurricane's intensity like wind speed is very tricky to measure cause they're changing constantly. So can anyone tell me how we get information about the intensity of a hurricane that's on the way? Jennifer?

Jennifer： Well, don't we ... like .... fly planes into it?

Professor: Right. Planes that monitor hurricanes fly through the eye of a hurricane to measure the speed of the storm's wind. But it's very expensive and brings a lot of risks.

Jennifer: I understand the point about it being risky for the pilots with the high winds and lightning and everything. But um ..

how can it be so expensive?

Professor：Well. You see, hurricane-monitoring planes are built to withstand strong winds. And they're usually loadeEl with a lot of sophisticated equipment that will measure wind speed and other things. One plane costs about 100 million dollars and its single flight costs like ... 5O thousand dollars. Plus, it can take as many as 10 flights to monitor a hurricane as it approaches land. From the readings of these direct measurements of hurricane force, we can determine whether to evacuate the area. But that's an expensive approach. I mean, we can't simply fly planes into every hurricane and cyclone.

。。。。。余下听力原文省略！

题目如下：

1.What is the main purpose of the discussion?

(A) To describe the design of hydrophones used by hurricane researchers

(B) To introduce a new approach to measuring the power of hurricanes and cyclones

(C) To explain how meteorologists study the causes of hurricanes and cyclones

(D) To discuss factors that determine the wind speed of hurricanes and cyclones

2.According to the professor, what is one benefit of hurricane monitoring airplanes?

(A) They help meteorologists determine the storm's path.

(B) They can gather all necessary information in just a few flights.

(C) Their equipment is not as sophisticated as a new techthnology.

(D) They can provide direct measurements of wind speed.

。。。。余下托福听力真题题目及答案省略！

10元有偿下载完整版2019年8月3日托福听力真题原文+题目+答案+mp3下载：hydrophone