无人机()是指根据无人机需要完成的任务、无人机的数最以及携得任务载荷的类型,对无人机

题型:单项选择题

问题:

无人机()是指根据无人机需要完成的任务、无人机的数最以及携得任务载荷的类型,对无人机制定飞行路线并进行任务分配。

A.航迹规划

B.任务规划

C.飞行规划

考点:无人机驾驶员理论任务规划与应急程序任务规划与应急程序题库
题型:单项选择题

培养和锻炼自己的意志,应该[ ]

①从小事做起,从现在开始,持之以恒,善始善终

②做自己不感兴趣却有长远意义的事

③主动迎接挑战,知难而进

④要制定明确的目标和计划

A、①②③④

B、③④

C、①②③

D、①②④

题型:单项选择题

The tasty cream-filled golden sponge(海绵) cakes have been an American favorite for decades. These are just a few of the sugary treats made by the beloved Hostess brand. But after more than 80 years, Americans have to say goodbye to these iconic (标志性的) desserts. Early last week, Hostess announced it is going out of business.

"Many people have worked unbelievably long and hard to keep this from happening," said Hostess CEO Gregory F. Rayburn. "Hostess Brand has no other alternative than to begin the process of getting down and preparing for the sale of our iconic brands." Along with Twinkles (奶油蛋糕) and Wonder Bread, cupcakes and other sugary treats may disappear from the shelves.

In the past decade, Hostess has experienced difficulties with its management and high labor costs. The company had money troubles in the past, but this time there was no way to recover. Along with the loss of sugary treats comes the loss of nearly 20,000 jobs. Hostess fans hope that another company will buy out the Hostess.

The downfall of Hostess is due not just to the company's financial problems, but also to a changing America. Our country's tastes and lifestyles are not the same as they were eighty years ago. Americans have become more health-conscious, and they are demanding more healthful food products. As a manufacturer of high-calorie products, Hostess does not fit into this new way of life.

To make matters worse for Hostess, Americans do not eat as much bread as they once did. "More and more people are choosing one-dish meals," said Harry Balzar. "The tradition of bread as a side dish is going out." Americans are finding alternatives to their morning toast too. Instead they’re choosing quick snacks like yogurt and energy bars.

Will Twinkles become an image of a bygone(过去的) America? Hostess fans hope that it will secure its spot on supermarket shelves for years to come. We can only wait. And maybe eat fruit for dessert instead.

小题1: What caused Hostess to be in trouble in the last 10 years? (no more than 7 words)

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小题2: Can you list three disappearing sugary desserts by Hostess? (no more than 5 words)

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小题3:What makes Hostess's situation more severe? (no more than 9 words)

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小题4: What's the hope of Hostess fans about this spongy snack's future? (no more than 20 words)

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题型:单项选择题

组成蛋白质的氨基酸不包括()

A.缬氨酸

B.异亮氨酸

C.脯氨酸

D.胍氨酸

E.酪氨酸

题型:单项选择题

水中的还原性物质有各种有机物、亚硝酸盐、硫化物、亚铁盐等,但主要的是()。

题型:单项选择题

动画背景设计是按设计的整体美术风格并依据故事清洁的要求,给每一个镜头中的角色提供表演、活 动的特定场景。

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