关于冠心病心绞痛的临床表现下列哪项是错误的（） A.胸骨上段或_爱下问搜题

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问题单项选择题

关于冠心病心绞痛的临床表现下列哪项是错误的（）

A.胸骨上段或中段后疼痛，放射至左臂内侧达无名指和小指

B.胸骨后压迫感

C.发生于劳力后或情绪激动后

D.持续3～5分钟，停止活动后即消失

E.发作时心率增快，血压增高

答案

参考答案：C

单项选择题

(B)

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.\

According to the text, Dollly Parton is ______.

A. a well-known surgeon

B. a mother of a four-year-old
C. a singer born in Tennessee
D. a computer programmer

选择题

实验室中下列物质不需要密封保存的是

A．石灰石

B．生石灰

C．氢氧化钠

D．浓盐酸