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【单选题】
某LTI系统输入为x[n]=δ[n]时输出为y[n]=R3[n]，则当输入为μ[n]-μ[n-2]时输出为：A.
R 3 [n]
B.
R 2 [n]
C.
R 3 [n]+R 3 [n-1]
D.
R 2 [n]+R 2 [n-1]
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举一反三
【简答题】“五个统筹”是指统筹城乡发展、统筹区域发展、统筹经济社会发展、统筹人与自然和谐发展、统筹国内发展和对外开放。贯彻落实“五个统筹”是贯彻落实科学发展观的根本途径。下列各项没有反映这－核心内容的是（ ）。
【简答题】“五个统筹”具体是指______、______、______、______、______。
【单选题】Which of the following DOES NOT belong to the subskills of communicating our ideas in writing?
A.
choosing the right vocabulary
B.
organising ideas in a helpful way
C.
using appropriate functions
D.
joining the words and sentences clearly
【单选题】What prevems people from writing on is ____
A.
putting their ideas in raw form
B.
attempting to edit as they write
C.
ignoring grammatical soundness
D.
trying to capture fleeting thoughts
【单选题】What prevents people from writing on is ________.
A.
putting their ideas in raw form
B.
attempting to edit as they write
C.
ignoring grammatical soundness
D.
trying to capture fleeting thoughts
【判断题】All there is to writing is having ideas. To learn to write is to learn to have ideas.
A.
正确
B.
错误
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