采用串行通信方式时,数据经过()根传输线被逐位顺序传输。A.2 B.3 C.1 D.

题型:单项选择题

问题:

采用串行通信方式时,数据经过()根传输线被逐位顺序传输。

A.2

B.3

C.1

D.8

考点:计算机等级考试PC技术计算机三级(PC技术)11
题型:单项选择题

为了对机动车尾气污染的人群健康效应进行评价,某医师列出了一些指标来反映该效应。其中最有意义的指标是

A.血铅、COHb

B.发铅、发汞

C.心电图、B超

D.肺功能、发汞

E.呼出气中苯和CO

题型:单项选择题

(12分)请写出元素周期表中第3横行17纵行的元素,回答下列问题:

⑴该元素的符号是              ,其原子结构示意图为                    ,属于                 元素(填“金属”或“非金属”)。

⑵该元素位于元素周期表第       周期             族,该族的名称为                           

⑶请写出该元素的单质与下列物质反应的化学方程式

①水                                                                                                                          

②氢氧化钠溶液                                                                                                 

③NaBr溶液                                                                                                               

题型:单项选择题

患者,女,51岁,已婚。阴部干涩,灼热瘙痒,带下量少色黄,五心烦热.烘热汗出,口干不欲饮,舌红少苔,脉细数无力。其治法是()

A.清热利湿,杀虫止痒

B.清肝利湿,杀虫止痒

C.滋肾降火,调补肝肾

D.滋肾养阴,除湿止带

E.养阴清热,燥湿止痒

题型:单项选择题

根据有关规定的要求,当年形成的会计档案在会计年度终了后,可暂由本单位财务会计部门保管( ) 年。

A.5

B.3

C.2

D.1

题型:单项选择题

Tim Richter and his wife, Linda, had taught for over 30 years near Buffalo, New York—he in computers, she in special education. "Teaching means everything to us", Tim would say. In April 1998, he learned he would need a heart operation. It was the kind of news that leads to some serious thinking about life’s purpose.
Not long after the surgery, Tim saw a brochure describing Imagination Library, a program started by Doily Patron’s foundation (基金会) that mailed a book every month to children from birth to age five in the singer’s home town of Sevier, Tennessee. "I thought, maybe Linda and I could do something like this when we retire," Tim recalls. He placed the brochure on his desk, "as a reminder."
Five years later, now retired and with that brochure still on the desk, Tim clicked on imagination library. The program had been opened up to partners who could take advantage of book and postage discounts.
The quality of the books was of great concern to the Richters. Rather than sign up online, they went to Dollywood for a look-see. "We didn’t want to give the children rubbish," says Linda. The books-reviewed each year by teachers, literacy specialists and Dollywood board members-included classics such as Ezra Jack. Keats’s The Snowy Day and newer books like Anna Dewdney’s Llama series.
Satisfied, the couple set up the Richter Family Foundation and got to work. Since 2004, they have shipped more than 12,200 books to preschoolers in their area. Megan Williams, a mother of four, is more than appreciative "This program introduces us to books I’ve never heard of."
The Richters spend about $400 a month sending hooks to 200 children. "Some people sit there and wait to die," says Tim. "Others get as busy as they can in the time they have left.\

What did Tim want to do after learning about Imagination Library

A. Give out brochures

B. Do something similar
C. Write books for children
D. Retire from being a teacher

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