单位时间内泵输送出去的液体从泵中获得的有效能量叫做泵的有效功率。

题型:判断题

问题:

单位时间内泵输送出去的液体从泵中获得的有效能量叫做泵的有效功率。

考点:甲醇装置操作工汽轮机操作汽轮机操作题库
题型:判断题

显影液配方的酸碱值不同,冲洗后底片的()各不相同。

A、保存期

B、密度、反差

C、清晰度

D、坚韧性

题型:判断题

其自由长度为l0,入土深度为h,且h<4.0/a(a为桩的变形系数)。下列四种情况中()种情况对抵抗桩的压曲失稳最为有利(即桩的计算长度Lc最小)。

A.

B.

C.

D.

题型:判断题

结构化查询语言SQL在哪年被国际标准化组织(ISO)采纳,成为关系数据库语言的国际标准?

A.1986

B.1987

C.1988

D.1989

题型:判断题

To produce the upheaval (激变) in the United States that changed and modernized the domain of higher education from the mid-1860s to the mid-1880s, three primary causes interacted. The (1) of a half-dozen leaders in education provided the personal force that was needed. (2) , an outcry (呐喊) for a fresher, more practical, and more advanced kind of instruction (3) among the alumni (校友) and friends of nearly all of the old colleges and grew into a movement that overrode (压倒) all (4) opposition. The aggressive "Young Yale" movement appeared, demanding partial alumni control, a more (5) spirit, and a broader course of study. The graduates of Harvard College simultaneously (6) to relieve the college’s poverty and demand new (7) . Education was pushing toward higher standards in the East by (8) off church leadership everywhere, and in the West by finding a wider range of studies and a new (9) of public duty.

The old-style classical education received its most crushing (10) in the citadel (城堡) of Harvard College, (11) Dr. Charles Eliot, a young captain of thirty-five, son of a former treasurer of Harvard, led the (12) forces. Five revolutionary advances were made during the first years of Dr. Eliot’s (13) They were the elevation and amplification of entrance requirements, the enlargement of the (14) and the development of the (15) system, the recognition of graduate study in the liberal arts, the raising of professional training in law, medicine, and engineering to a postgraduate level, and the fostering (培养) of greater (16) in student life. Standard of admission were sharply advanced in 1872—1877. (17) the appointment of a clean (院长) to take charge of student affairs, and a wise handling of (18) , the undergraduates were led to regard themselves more as young gentlemen and (19) as young animals. One new course of study after another was (20) —science, music, the history of the fine arts, advanced Spanish, political economy, physics and international law.

13()

A.administration

B.manipulation

C.regulation

D.institution

题型:判断题

可以从压送循环流量记录与泵送循环流量计录不相似上,判断模拟移动床工艺中两转阀不同步。()

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