关于α-丁酸萘酚酯酶(α-NBE)染色,下述概念不正确的是() A.粒细胞系统均为阴

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问题:

关于α-丁酸萘酚酯酶(α-NBE)染色,下述概念不正确的是()

A.粒细胞系统均为阴性反应

B.幼单核细胞为阳性反应,不被NaF抑制

C.组织细胞呈阳性反应,不被NaF抑制

D.非T非B细胞可呈颗粒状阳性

E.幼单核细胞为阳性反应,可被NaF抑制

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什么叫调制灵敏度?

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Writing about music is like dancing about architecture, or so the saying goes. Sometimes attributed to Frank Zappa, other times to Elvis Costello, this quote is usually intended to convey the futility of such an endeavor, if not the complete silliness of even attempting it. But Glenn Kurtz’s graceful memoir, Practicing: A Musician’s Return to Music, turns the expression on its head, giving it a different meaning by creating a lovely, unique book.
Kurtz picked up the guitar as a kid in a music-loving family, attended the Long Island music school, and went on to play on Merv Griffin’s TV show before graduating from Tufts University. Motivating the young Kurtz was the dream of reinventing classical guitar, as if by his great ambition alone he could push it from the margins of popular interest to center stage-something not even accomplished by the late Spanish guitarist Andres Segovia, perhaps the only artist of the form ever to reach anything resembling widespread celebrity.
This book reads like a love story of sorts: Boy meets guitar. Boy loves guitar. Guitar breaks boy’s heart or, more precisely, the ordinariness of a working musician’s life does so. "I’d just imagined the artist’s life naively, childishly, with too much longing, too much poetry and innocence and purity," Kurtz writes. "The guitar had been the instrument of my dreams. Now the dream was over. "
Boy leaves guitar. Were the story to end here, this book would be a tragedy, but after nearly a decade the boy returns to guitar, and although he has lost the enthusiasm he had in his youth, he finds his love of the guitar again in a way he never could have appreciated before.
Although Kurtz is writing about a unique musical path, his journey speaks eloquently to the heart of anyone who has ever desperately yearned to achieve something and felt the sting of disappointment. "Everyone who gives up a serious childhood dream—of becoming an artist, a doctor, an engineer, an athlete—lives the rest of their life with a sense of loss, with nagging what it is," he writes. "Is that time and effort, that talent and ambition, truly wasted \

According to the passage, Andres Segovia ______.

A.helped Glenn Kurtz to become a good guitarist

B.made classical guitar become a popular form

C.was a well-known classical guitarist

D.was Glenn Kurtz’s role model

题型:单项选择题 A1/A2型题

1839年将细胞学说从植物界扩展到动物界,形成了适用于整个生物界的细胞学说的是( )。

A.施莱登

B.施旺

C.雷马克

D.寇力克

题型:单项选择题 A1/A2型题

电子客票的报销凭证是()

A.买票时另外填开的发票

B.电子客票行程单

C.必须换开成纸质客票

D.旅客订座记录单

题型:单项选择题 A1/A2型题

按照现行《建筑桩基技术规范》(JGJ94),端承灌注桩在灌注混凝土之前,孔底沉渣厚度最大不能超过下列哪个选项的限值?()

A.300mm

B.150mm

C.100mm

D.50mm

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