【单选题】【消耗次数：1】
Middle school students aren’t ______ to smoke.
①
A.ordered
②
B.prepared
③
C.allowed
④
D.made
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下述程序的运行结果（ ）。
#includevoid main()
{
int a=4,b=3,c=5,t=0;
if(aa=b;b=t;
if(aa=c;c=t;
printf(%d,%d,%d\n,a,b,c);
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下述程序的运行结果（ ）。
#includevoid main()
{
int a=4,b=3,c=5,t=0;
if(aa=b;b=t;
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对于矩阵A,B<img class=jc-formula data-tex={ (AB) }^{ T }={ A }^{ T }{ B }^{ T } src=https://huaweicloudobs.ahjxjy.cn/C35899271540C4AFE341D16741CADC6D.png style=vertical-align: middle;/>
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