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【单选题】
画正圆形时,先选取椭圆工具,同时按下( )键。
A.
Ctrl
B.
Alt
C.
Shift
D.
Delete
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参考答案:
举一反三
【判断题】信号可分为周期信号与非周期信号
A.
正确
B.
错误
【简答题】The author’s attitudes towards future, as is indicated in the beginning of the second paragraph, is one of______. [A] reluctant acceptance [B] sheer pessimism [C] mild optimism [D] extreme hopefulness
【单选题】信号从周期性上可分为()
A.
确定性信号与随机信号
B.
周期信号与非周期信号
C.
连续时间信号与离散时间信号
D.
一维信号与多维信号
【单选题】There are______ as many houses in this area as there used to be.
A.
two
B.
twice
C.
second
D.
secondly
【单选题】Which of the following, if true, might be an example of the 'exceptions' cited in the second paragraph of the passage?
A.
Despite the generally grave tone of her verse, Rossetti often used formal and cheerful language in her poetry.
B.
Rossetti, unlike her contemporaries, relied upon long cadences to express her mood as a poet.
C.
Rossetti often preferred rhyme schemes more complicated than those used by her peers.
D.
Rossetti's work demonstrated a more broad-minded intelligence than that of many Pre-Raphaelites.
E.
Rossetti, in spite of her romantic aesthetic, made many more attempts at developing style. less laden with sentimentality than that of other Pre-Raphaelites.
【单选题】为使测量精确,测速管(也称毕托管)前后应有一稳定段,其长度约为 ( ) 。
A.
5米
B.
50米
C.
50d
D.
25d
【单选题】地震来临时,下列逃跑行为正确的是:
A.
拿好贵重物品,再向外逃跑
B.
迅速寻找稳定的三角区躲避
C.
大喊大叫
D.
迅速乘电梯逃生
【简答题】根据信号具有的时间函数特性,可以分为确定性信号与 ,连续信号和 , 和非周期信号,能量信号和功率信号
【判断题】信号可以分为确定性信号与随机信号,周期信号与非周期信号,连续时间信号与离散时间信号等。()
A.
正确
B.
错误
【单选题】One of the functions of the(71)is to store the applications programs { or the various secondaries. The(72)may have similar or dissimilar functions. The same control code received from two different, s...
A.
peripherals
B.
host computer
C.
the interface
D.
the client
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