单项选择题

Announcer: Hello and welcome to today’s show, Liuda’s Garden. Today, we’ll be interviewing Linda on her amazing techniques at growing a square -foot garden.
Mike: Good morning and my name is Mike, and I have a special guest today, Linda. Linda, you truly have an amazing garden. Could you let us know how you’re kind of putting this together
Linda: Well, thank you, Mike. I have tried various attempts at gardening and with different, urn, degrees of success. This spring I took a square - foot gardening class, and I decided to try some of the things I’ve learned. Urn, one of the most important things in square - foot gardening is that you choose a good location. You need at least 6 to 8 hours of direct sunshine. Urn, you also need to choose a location that has good drainage, and it should be a convenient location. A garden is a lot more fun if you are walking by and seeing it all the time. Urn, you need to decide what kind of containers you want, or, in my ease, I used boxes, um, wooden boxes, and then I divided them up into one -foot squares. And then just decided what I wanted to plant, and based on what the final plant would look like, I had 1 per square, or maybe 3 per, um, 3 or 4 per square, 12 per square.
Mike: Well, Linda, I’m, I’m . . . truly amazed at kind of the architecture of this garden. I’ve noticed these vertical beams. I’ve never seen that before. Could you explain that to us a little bit
Linda: Well, for example, right here we have some, um, cantaloupe, and cantaloupe take a lot of space when you grow them out on the ground, and I don’t have that much space, and so, I’ve just grow them up. Just grow them vertically. I’ve just made, um, a metal frame, and taken some strings, I just allow them to grow up, and they will support themselves, the cantaloupe will. And all kinds of different vines you can do this with.
Mike: This is truly amazing. I noticed this garden, a vast amount of vegetation. Can you explain to me what you have growing in this garden
Linda: Well over on the far end, I have tomatoes growing vertically. In front of those I have, urn, green peppers, basil, strawberries, uh, beets, um, green beans, corn, carrots, all kinds of different vegetables like that. Right here, as I said before, I have, urn, cantaloupe. Down at the bottom, I have some Mexican tomatoes called tomatillos. And down at this end, I have egg plant, another kind of pepper called banana peppers, urn, cucumbers, okra, pumpkins... and [ think that’s about it.
Mike: Well, Linda, this is truly amazing. I’m so impressed, and I know out viewers will be impressed about this, this, this excellent garden. Just truly amazing. I’d like to thank you very much for having us in today to look at your garden [Thank you, Mike]. In a few minutes, viewers, we will let you see the entire garden, and maybe Linda will kind of show you around. So, we thank you very much for being with us today, and our special guest, Linda. Have a nice day.
What will happen at the end of the show().

A. Linda will give tips on how to prepare the soil.
B. Linda will discuss building a green house.
C. Linda will give a tour of her garden.
D. Linda will invite her friends to her house.

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It can be inferred from the passage that ______ can give you an appetite. [A] increased blood concentrations of insulin [B] decreased blood concentrations of insulin [C] decreased blood concentrations of acylated ghrelin [D] increased blood concentrations of acylated ghrelin

At the same time, as many people have found after starting a new exercise regimen, working out can have a significant effect on appetite. The mechanisms that control appetite and energy balance in the human body are elegantly calibrated. "The body aims for homeostasis, " Braun says. It likes to remain at whatever weight it’s used to. So even small changes in energy balance can produce rapid changes in certain hormones associated with appetite, particularly acylated ghrelin, which is known to increase the desire for food, as well as insulin and leptin, hormones that affect how the body burns fuel.
The effects of exercise on the appetite and energy systems, however, are by no means consistent. In one study presented last year at the annual conference of the American College of Sports Medicine, when healthy young men ran for an hour and a half on a treadmill at a fairly high intensity, their blood concentrations of acylated ghrelin fell, and food held little appeal for the rest of that day. Exercise blunted their appetites. A study that Braun oversaw had a slightly different outcome. In it, 18 overweight men and women walked on treadmills in multiple sessions while either eating enough that day to replace the calories burned during exercise or not. Afterward, the men displayed little or no changes in their energy-regulating hormones or their appetites, much as in the other study. But the women uniformly had increased blood concentrations of acylated ghrelin and decreased concentrations of insulin after the sessions in which they had eaten less than they had burned. Their bodies were directing them to replace the lost calories. In physiological terms, the results "are consistent with the paradigm that mechanisms to maintain body fat are more effective in women, "Braun and his colleagues wrote. In practical terms, the results are scientific proof that life is unfair. Female bodies, inspired almost certainly" by a biological need to maintain energy stores for reproduction, "Braun says, fight hard to hold on to every ounce of fat. Exercise for many women increases the desire to eat.

单项选择题

For what reason did the Puritans among the first immigrants come to America from England

[A] They came to America to seek wealth.
[B] They just wanted to escape religious persecution.
[C] They planned to build a new nation in a new place.
[D] They explored the new land for stimulation.