牙体预备时为避免对牙髓的损害所采取的做法中,不正确的是() A.间歇磨切 B.局部麻

题型:单项选择题 A1/A2型题

问题:

牙体预备时为避免对牙髓的损害所采取的做法中,不正确的是()

A.间歇磨切

B.局部麻醉下磨切

C.分次完成

D.轻压磨切

E.水雾冷喷

考点:口腔医学技术(主管技师)口腔内科学常识口腔内科学常识题库
题型:单项选择题 A1/A2型题

植物由一株小苗长成一棵参天大树是因为是细胞的_______和分化的结果。

题型:单项选择题 A1/A2型题
电气化铁路的输电线常用图所示的方式悬挂在钢缆上.钢缆的A端固定在电杆上,B端连接在滑轮组上.滑轮组由a、b、c三个滑轮构成,配重P由多个混凝土圆盘悬挂在一起组成,配重的总重为G,若不计摩擦和滑轮的重量,则以下说法中正确的是(  )

A.a为动滑轮,B端钢缆受到滑轮组的拉力大小约为3G

B.a为动滑轮,B端钢缆受到滑轮组的拉力大小约为G

C.a、c为动滑轮,B端钢缆受到滑轮组的拉力大小约为3G

D.a、c为动滑轮,B端钢缆受到滑轮组的拉力大小约为G

题型:单项选择题 A1/A2型题

简述废纸脱墨机理和脱墨方法。

题型:单项选择题 A1/A2型题

Don’t have time to read anymore Now you can get free, quick literature via email. More than 100,000 people open their email each day to read a chapter of a book, through Chapter-A-Day, an online book club created two years ago. It’s a free email service that provides a short daily reading for busy people, exposing them to literature they may not find on their own, inspiring some to recommit to the reading habit. About 550 public library systems representing over 3,000 branch libraries already have signed up to offer Chapter-A-Day. Via email, participants get about five minutes’ worth of reading every day. After three chapters are emailed, the installments stop, and those who want to keep reading can borrow the book at their public library or purchase it online. Chapter-A-Day has eight free book clubs, and sells thousands of books each month.

Chapter-A-Day started in 1999 when Suzanne Beecher, a lifelong book lover, realized how many of the women who worked part-time for her software development company didn’t have time in their busy lives to read. She decided to type part of a chapter of a book, and send it to her employees through email. The next day she typed a little more, and continued to send literary installments each day. She says she started getting feedback from the staff about how reading made them feel. "They were interested, and realized that, though they didn’t have time in their busy lives for reading, just reading that little bit each day got them back in the habit." Realizing that many other people could benefit, she decided to take the idea even further and start an email "chapter-a-day" book club to help others ease their way back into daily reading. "Reading makes changes in people’s lives," Beecher says.

Pat Dempsey, a librarian at a public library in Ohio, has found Chapter-A-Day helps her library clients get back in the habit of reading. "It’s a different way to get people hooked on hooks," she says.

The passage was written in ().

A. 1999

B. 2000

C. 2001

D. 2002

题型:单项选择题 A1/A2型题

在天气描述图上,用平滑的连线的阴影标出的区域表示().

A.整个区域的云底低于1000ft和/或能见度低于3mile

B.区域的50%以上为IFR区域

C.标出区域的报告站在报告时间为IFR条件

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