___(1): Is the 3D printing fast?

thor of the article believes that it isthe test system, ______ teachers, that is responsible for the heavy burden of themiddle school students nowadays. ,____ country in Central America, isthe only place in the world ____ someone can see the sun rise on the PacificOcean and set on the Atlantic. is known to us all isthe old scientist, for whom life was hard in the past, still works very hard in his eighties. Carbon dioxide(CO2)_______ from burning fuels isthe most common of the so-called greenhouse gases. d we put off the meeting”she asked.—“_______,”he answered politely.“This isthe only day everyone is available.” isthe Amazon River— Some experts say it’s 7,025 kilometresbut others say it’s 6,440 kilometres. The task is challenging and demandingWho do you think can make it—- ___________my partner have a try I think she isthe right person to do it ce Craven,a doctor from the USA,isthe author of several published reports,one of ________introducedthe idea in 1953 aspirin could reduce the risk ofheart attacks The 22-year-old, who is perhaps most famous ____ her role in 2004 film the House of D, isthe actor’s only daughter with his ex-wife Marsha[ ] 以下错误的定义语句是（ ?）。: int x[3][3]= {{1,2,3},{1,2,3},{1,2,3}{1,2,3}}; int x[4][3]={{1,2,3},{1,2,3},{1,2,3}{1,2,3}}; int x[][3]={1,2,3,4}; int x[][3]={{0},{1},{1,2,3}}; 表达式[1,2,3]*3的执行结果为_______: [1,2,3,1,2,3,1,2,3]|[3,6,9]|[[1,2,3]*3]|[[1,2,3],[1,2,3],[1,2,3]] 设α1=（1，1，1），α2=（1，2，3），α3=（1，3，t），当____时，α1、α2、α3线性无关。 （1+1/2+1/3）×（1/2+1/3+1/4）-（1+1/2+1/3+1/4）×（1/2+1/3）＝（） 若有定义int a[3][5]; 则对数组元素a[1][3]不能正确引用的是: (*(a+1))[3]|*(*(a+1)+3)|*(*a+1)+3|a[1][3] 1/（1+2）+1/（1+2+3）+1/（1+2+3+4）+……+1/（1+2+3+……+50）=（） 1/3 3 1/12 4/3 3/64 （ ） 设α(→)1＝（1，1，1）T，α(→)2＝（1，2，3）T，α(→)3＝（1，3，t）T，当____时，α(→)1、α(→)2、α(→)3线性无关。 1，1/3，2，2/3，3，1，4，（） 下列语句执行结果是[1,2,3,1,2,3,1,2,3]。a=[1,2,3]print（a*3）（） 1，1，3，1，3，5，6，（）