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Itismuch(hot)todaythanyesterday.

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Sheisalittle(careful)thanherclassmates.

Whichbookis(easy),thisoneorthatone?

_1_2 （据通知）that Prof. Wang Hua is unable to come to our school3 （因为）a sudden illness. The doctor predicated that he would recover from his illness in a couple of days. His lecture on Computer and Sciencehas been rescheduled on 4 , at5 （4月20日，星期四，上午9点）in 6 (新教学楼大厅).7 (所有师生)of Information Department 8(必须)to be present. Teachers and students from other departments are welcome.

已知序列x(n)={5，2，4，-1，2}，h(n)={-3，4，-1}，y(n)=x(n)*h(n)，利用MATLAB编程计算，可得y(1)=（）。

A. 14
B. 17
C. -15
D. -9