| Music comes in many forms; most
countries have a style of their own. (1) the turn of the
century when jazz was born, America had no prominent (2) of
its own. No one knows exactly when jazz was (3) ,or by whom.
But it began to be (4) in the early 1900s. Jazz is America’s
contribution to (5) music. In contrast to classical music,
which (6) formal European traditions, jazz is spontaneous
and free-form. It bubbles with energy, (7) the moods,
interests, and emotions of the people. In the 1920, jazz (8)
like America. And (9) it does today. The (10)
of this music are as interesting as the music (11)
. American Negroes, or blacks, as they are called today, were the jazz
(12) . They were brought to the Southern states (13)
slaves. They were sold to plantat A. months B. weeks C. hours D. times [单选题]12.[单选] 动车组列车更换动车组司机（同向换乘除外）后，需进行（ ）。
A.A.牵引试验 B.B.简略制动试验 C.C.全部制动试验 [判断题]直接责任人因外界投诉定性A类问题积6分，联挂当班列车长（餐车长）积2分，领导列车长积1分。
A.正确 B.错误 [单选题]患儿，6岁，肾病综合征，入院查体时患儿面部、腹壁及双下肢明显水肿。化验结果：胆固醇升高，血浆蛋白降低，尿蛋白（++++）。患儿病情好转准备出院时，护士进行健康指导时应强调( )
A.预防本病的诱因 B.遵医嘱继续服药，不得随便停药 C.讲解预防复发的注意事项 D.向患者讲解合理饮食的重要性 E.说明不能剧烈活动的重要性 [单选题]根据《网络安全法》的规定，（ ）应当为公安机关、国家安全机关依法维护国家安全和侦查犯罪的活动提供技术支持和协助。
A.电信科研机构 B.电信企业 C.网络合作商 D.网络运营者 [单项选择]洋地黄中毒伴缓慢心律失常时应首选的治疗措施是（）
A. 肾上腺素 B. 阿托品 C. 人工心脏起搏 D. 氯化钾 E. 异丙肾上腺素 [名词解释]地区生产专业化
[单选题]发时，灰缝的厚度( )。
A.上口不得超过12mm，下口不得小于8mm B.上口不得超过13mm，下口不得小于7mm C.上口不得超过14mm，下口不得小于6mm D.上口不得超过15mm，下口不得小于5mm 我来回答: 提交
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