移动发射机的发射TD调制信号功率范围是()A.21至33 B.21至27 C.23至

题型:单项选择题

问题:

移动发射机的发射TD调制信号功率范围是()

A.21至33

B.21至27

C.23至30

D.23至33

考点:通信工程师TD认证综合试题TD认证综合试题题库
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已知4tanα+cotα=-4,求sinα和cosα的值.

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触电不治、确认死亡的特征是()。

A、四肢冰冷

B、瞳孔放大

C、出现尸斑

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初唐的人们探究梁、陈、北齐的祸乱之源,往往归咎于淫靡的文风,并要求建立一种新的文风,以适应唐代大一统的政治局面,这无疑对初唐文坛的建设起到了推动作用。但以文风不振作为亡国之因,毕竟本末倒置。
上面这段话主要支持了这样一种观点( )。

A.唐代大一统的政治局面需要建立一种新的文风
B.把文风不振作为封建王朝的亡国之因是错误的
C.把文风不振作为亡国之因有利于文坛的建设
D.文风不振作为亡国之因虽不科学,但起到了积极的作用

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脊髓腰膨大的位置是()

A.L1~L2

B.L1~L3

C.L2~L4

D.T10~L1

E.T10~L2

题型:单项选择题

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.

19()

A.little

B.less

C.much

D.even

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