题干

运行框图输出的S是255,则①应为(   )

A:n≤6

B:n≤7

C:n≤8

D:n≤9

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答案(点此获取答案解析)

C

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Favorite Books for Kids

◆Me and Marvin Gardens by A. S. King

    Image Source: Scholastic

    This middle-grade novel is perfect for introducing kids to recycling, but with a fun science fiction story. Obe lives on his family's farmhouse that was built a hundred years ago-and now it's being taken over by developers. While adventuring on the land, he discovers a creature, Marvin Gardens, which only eats plastic. Kids will love this charming story.

    Available from Amazon, $11.89

    Wrinkle in Time: A Guide to the Universe by Kari Sutherland

    Image Source: Disney Publishing World Wide

    Kids may get excited to see A Wrinkle in Time. While the original novel may be too hard of a read for them right now, they can dive into the fantastical world the film takes place in with this awesome guide to the characters and locations.

    Available from Amazon on March 6, $11.04

◆Rivers of Sunlight by Molly Bang and Penny Chisholm

    Image Source: Scholastic

    Get kids going green with a little help from this educational picture book! Filled with excellent artwork and helpful explanations, these pages are filled with important lessons about the Earth. Kids will learn about how the sun keeps the ocean currents(流)moving and how the sun can power all living things—it's pretty amazing.

    Available from Amazon, $7.67

◆How to Code a Sandcastle by Josh Funk

    Image Source: Penguin Random House

    Pearl's sandcastle keeps getting ruined by puppies (who could be mad at that?). So she teams up with her Robot friend Pascal to solve the problem with code(编码). Combining the fun of building a sandcastle with the discovery of coding, a future engineer will love paging through this story.

    Available from Amazon on May15, $16.99

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       也许是因为年龄的增长吧,我对二十四节气越来越在意了。对,在意。春夏的几个节气感觉还好些。①秋天就不同了,立秋、处暑、白露、秋分、寒露、霜降,像坐滑梯似的,止都止不住;②况且它们的手一个比一个凉,表情也一个比一个冷漠、生硬,但又不得不跟着它们一步步地往岁月深处走,哪怕后退半步也是不可能的。走着走着,一场铺天盖地的白霜便突然降临了。

       其实,这世界上没有什么事情是突然的。但我们还是喜欢用“突然”来表述那些出乎意料的现象。就说惊蛰吧,也不是陡然的一声响雷这么简单。据我多年的观察,惊蛰也有着怀柔的一面,在它到来之前,常常会有几个暄透的好日头,笑容可掬的样子,把藏匿于瓦砾、枯草里星星点点的残雪悄悄消融掉,再把僵硬的泥土弄得酥软了,然后才是一记重雷。

       乡村就有这么个好处,它使你觉得这世界上的一切东西,都是有根有脉、有因有果的。③比如霜降,它的威严是由立秋、处暑、白露、秋分一点一点铺垫起来的,只有当这些“法律程序”走完了之后,它才冷下面孔说“不”。而它一旦说“不”时,就是铁板钉钉的事了。④节气就是这样有规矩,也守规矩,该冷的时候冷,该热的时候热,该立的时候立,该废的时候废。然而冷与热,立与废,都使你心服口服。