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【单选题】
病人,男性,18岁。1小时前因踢球致踝部扭伤,正确A.
理方法是
B.
热敷
C.
冷敷
D.
按摩
E.
红外线照射
F.
绷带包裹
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反馈参考答案：
举一反三
【判断题】在深度负反馈的条件下,闭环放大倍数 A f ≈1/F ,它与反馈系数有关,而与放大器开环时的放大倍数 A无关,因此可以省去放大通路,仅留下反馈网络,来获得稳定的闭环放大倍数。( )
A.
正确
B.
错误
【单选题】The average starting salary for graduates at a university is $25,000 with a standard deviation of $2000. A histogram of the data shows the shape to be very erratic so Chebyshev’s Theorem should be use...
A.
at least 75%
B.
at least 89%
C.
at least 68%
D.
at least 95%
【判断题】在深度负反馈的条件下,闭环放大倍数 A F ≈ 1/ F ,它与负反馈有关,而与放大器开环放大倍数 A 无关,故此可以省去放大通路,仅留下反馈网络,来获得稳定的放大倍数。
A.
正确
B.
错误
【单选题】Histogram shows how many pixels occur at ( )
A.
an image
B.
each region in an image
C.
each gray level
D.
each object in an image
【简答题】活塞式发动机的辅助工作系统包括__、___、____、__、___、____。
【单选题】When tuning Automatic PGA Memory Management， which of the following views will provide the information specified？（）
A.
The V$PGA_TARGET_ADVICE view shows the predicted cache hit-ratio improvement if you increase PGA_AGGREGATE_TARGET
B.
The V$PGA_TARGET_ADVICE view shows how the V$SQL_WORKAREA histogram will change if you change the value of PGA_AGGREGATE_TARGET
C.
The V$PGA_TARGET_ADVICE_HISTOGRAM view shows how the V$SQL_WORKAREA_HISTOGRAM will change if you switch between Manual and Automatic PGA Memory Management
D.
The V$PGA_TARGET_ADVICE view shows how performance will improve for the different work areas if you switch from Manual to Automatic PGA Memory Management
【判断题】在深度负反馈的条件下,闭环放大倍数A f ≈1/F,它与反馈系数有关,而与放大器开环时的放大倍数A无关,因此可以省去放大电路,仅留下反馈网络,来获得稳定的闭环放大倍数。
A.
正确
B.
错误
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