托?？谡Ztpo24范文

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托?？谡Ztpo24范文

Animal fossils usually provide very little opportunity to study the actual animal tissues, because in fossils the animals' living tissues have been largely replaced by minerals. Thus, scientists were very excited recently when it appeared that a 70-million-year-old fossil of Tyrannosaurus rex (T. rex), a dinosaur, might still contain remains of the actual tissues of the animal. The discovery was made when researchers deliberately broke open the T. rex’s leg bone, thereby exposing its insides to reveal materials that seem to be remains of blood vessels, red blood cells, and collagen matrix. First, the breaking of the fossilized leg bone revealed many small branching channels inside, which probably correspond to hollows in the bones where blood vessels were once located. The exciting finding was the presence of a soft, flexible organic substance inside the channels. This soft substance may very well represent the remains of the actual blood vessels of T. rex. Second, microscopic examination of the various parts of the inner bone revealed the presence of spheres that could be the remains of red blood cells. Tests showed that the spheres contained iron-a material vital to the role of red blood cells in transporting oxygen to tissues. Moreover, the spheres had dark red centers (substances with iron tend to be reddish in color) and were also about the size of red blood cells. Third, scientists performed a test on the dinosaur leg bone that showed that it contained collagen. Collagen is a fibrous protein that is a main component of living bone tissue, in which it forms a so-called collagen matrix. Collagen (or its chemical derivatives) is exactly the kind of biochemical material that one would expect to find in association with bone tissue.

托福口語：TPO24Task3題目范文

托?？谡ZTPO24task3題目 Reading Part:

Close the Campus Coffee house

I propose that the university close the campus coffeehouse. Coffeehouses are great, if people actually use them, like to socialize with friends, while enjoying a cup of coffee and a snack. But students are not using our campus coffeehouse. Thereare usually lots of empty tables when I p ass by the place. It’s just a waste of space that could be used for other things. Also, the food at the coffeehouseis not very good. The last time I was there, the cakes and muffins my friends and I ordered were dry and didn’t have much flavor. Sincerely,Greg Smith

托福口語TPO24task3題目 Listening Part:

Now listen to two students discussing the letter.

(woman) I don’t like his proposal.

(man) Why not? There are never many students there.

(woman) But that’s why I like about it, that it’s never crowded.

(man) Really?

(woman) Yeah, so it’s a great place to study. I go there a lot. I’ll read a book or bring my laptop computer and work on a paper for class. It’s never very noisy.

(man) You’re able to get work done there?

(woman) Absolutely! In fact, I actually prefer it to the library as a place to stud y, and a lot of other students do, too. We even study for our final exams there, and you can eat there while you work, something you can’t do with the library.

(man) OK, but you don’t actually like the food there, do you? I mean, he said.

(woman) Well, I don’t think he’s been there recently, I mean, it’s true that it wasn't that great in the past, but I think it’s a lot better now.

(man) What’s changed?

(woman) They have a new manager and I guess she’s made some improvements in the quality of the food. I was there last week and the food was delicious.

(man) Really?

(woman) Yeah, really! And the new manager has also added a lot of really healthful foods and snacks, so the food doesn't just taste good now. It’s good for you, too.

(man) Hmm, I’ll have to try the place.

托?？谡ZTPO24task3題目 Question:

The woman expresses her opinion about the student’s proposal. State her opinion and explain the reasons she gives for holding that opinion

托福口語TPO24task3范文：

The student proposes to close the Campus Coffee house because students usually don’t use it and thefood in the coffee house is not good. The woman in the conversation doesn’tlike the proposal. She says the good thing about the Coffee House is that it’snever crowded. So it’s a great place to study. She always reads a book or workson a paper in it. She even prefers it to the library. Plus, students can eatwhile they study there. She also says that though the food wasn’t great, it’s alot better now. The Coffee House has got a new manager. Last week she wentthere and the food was delicious. Besides, the new manager has added a lot of really healthy food and snack.

托福tpo24口語task4綜合口語范文

Environmental organizations work to protect plants and animals whose natural habitats are threatened by human activity. One way they do this is by selecting a particular species to represent the threatened habitat to the general public. This species, called a flagship species, is one that people are likely to find attractive and interesting. The flagship species is used to raise public awareness and motivate people to take action to protect the threatened habitat. People’s support of the flagship species results in protection for all the plant and animal species living in the threatened area.

托?？谡ZTPO24 Task2(題目+范文)

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