更多“键与键槽宽ｂ配合采用（ ）制，满足不同的性能配合要求”相关的问题
提高往复式内燃机的功率的方法有很多，根据有效功率的公式大致可归为四种，目前提高内燃机功率的主要方法是（）。
A.增加内燃机排量
B.采用四冲程内燃机
C.提高内燃机转速
D.提高内燃机平均有效压力
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通风机的压力可用水柱高度来表示，称为（）。
A、厘米水柱
B、分米水柱
C、毫米水柱
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在完全竞争的经济中，价格的调节可以使资源配置达到最优状态。
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评估某块城市规划确定的住宅用地，土地总面积为1500m2。 (1)收集有关资料：共调查了A、B、C三宗土地买卖实例作为比较实例。 (2)可比实例的成交价格如下表所示。实例
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A college education is not just preparation for a career,however. In addition to taking courses in their major field of study, students enroll in elective(选修的) courses. They may take classes that help them understand more about people, nature, government, or the arts. Well-rounded people are likely to be better citizens, better parents and more interesting and interested individuals. Although two-thirds of American high school graduates go on to study in college, recent high school graduates no longer dominate the college campuses. Adults of all ages return to the classroom, either for new vocational skills or for personal growth. In 1966,for example,almost 20%of American college students were over age 35. Some 500,000 college students are over 50. American faith in the value of education is exemplified by the rising number of Americans who have at least a bachelors degree. Almost one-quarter of Americans over age 25 are college graduates. College attendance is not reserved for the wealthy and the academically talented. It is available to anyone who wants to go. Right now about 15 million students are taking advantage of the opportunity. For those not academically prepared to handle college-level work, about 80% of undergraduate schools offer remedial ( sometimes called developmental)classes in reading,writing and math.The U. S. has about 3,700 institutions of higher learning. About 1,600 of these are 2-year schools. More than 2,000 are 4-year schools, many of which also have graduate programs. With so many colleges to choose from,how do prospective students find the right one for their needs? Information about schools is easy to obtain. Students can write for printed information and applications. Some schools even mail out video. Students can also use computer programs that allow them to specify particular interests and print out a list of schools that fit their description. Most institutions of higher learning also have web sites. Many schools send college representatives to high schools and two-year colleges to recruit students. Finally,many students visit colleges,take tours of campuses,and talk to counselors.The word 'well-rounded'in Paragraph 1 means______.A．well developed in a range of aspectsB．rounded in shape or well developedC．well planned and balancedD．full, varied, and satisfying
A.TheB.TheC.A．wellD.roundedE.wellF.full,
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人从明处突然进入暗处，人的感受阈限（）。
A.缓慢下降
B.急速下降
C.缓慢上升
D.急速上升
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患儿，男，16岁，左下后牙龋洞，无明显自发疼痛，食物嵌入时疼痛。检查：面龋坏，软化牙本质较多，叩(-)，冷试敏感，电活力正常。去除无基釉后去腐敏感，不能全部去净。充填时垫底材料选用（）
A．磷酸锌粘固粉单层
B．聚羧酸锌粘固粉单层
C．玻璃离子粘固粉单层
D．氧化锌丁香油粘固粉和磷酸锌粘固粉双层
E．氢氧化钙制剂
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费纳蒂教授对金融工程的定义强调了( )。
A．金融工具的种类多样性
B．对金融工具的应用
C．金融工序的重要性
D．金融工序的复杂性
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要使脱戊烷塔灵敏板温度降低，应（）塔底加热量。
A . A、降低
B . B、提高
C . C、不变
D . D、无法确定
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根据“给定材料1”，谈谈你对大数据时代信息安全风险的看法。 要求：观点明确，分析深入，条理清晰，篇幅不超过200字。
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下列关于我国刑事诉讼中补充侦查的叙述中，正确的是____
A．人民检察院审查案件，对于需要补充侦查的，可以退回公安机关补充侦查，也可以自行侦查
B．对于补充侦查的案件应当在2个月以内补充侦查完毕
C．对于一个案件侦查完毕移送审查起诉后，人民检察院决定补充侦查的次数，总计不得超过两次
D．经过两次补充侦查后，人民检察院仍然认为证据不足，不符合起诉条件的，应当作出不起诉的决定
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最适宜的方剂是（）
A.保和丸
B.温胆汤
C.左金丸
D.竹茹汤
E.麦冬
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有的油层尽管（）较高，也具有一定的压力，但由于原油物性差、粘度大、流动性很差，同样不能获得理想的产量。
A.含油饱和度
B.含水饱和度
C.有效厚度
D.渗透率
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