31．The narrator wants to be a professional clown.

31.The people injured in the accident( send ) to the nearest hospital for treatment last night.

31.The true value of making tools for machines lies in the exploration of the investigation of things and extension of knowledge. A: True B: False

以下哪些语句正确？（） A: doublesnow[]=newdouble[31]； B: doublesnow[31]=newarray[31]； C: doublesnow[31]=newarray； D: double[]snow=newdouble[31]；

5/7,7/12,12/19,19/31,(<br/>)。() A: 31/49 B: 1/39 C: 31/50 D: 50/31

试分析>>>和>>的区别,并分析下列程序段的执行结果:int b1=1; int b2=–1; b1<<=31; b2<<=31; b1>>=31; b2>>=31; b1>>>=31; b2>>>=31;

在测量金属丝的杨氏模量实验中,米尺的标准差是: A: σ仪=△仪/31/2=3/31/2=1.7mm B: σ仪=△仪/31/2=2/31/2=1.2 mm C: σ仪=△仪/31/2=1/31/2=0.6 mm D: σ仪=△仪/31/2=0.5/31/2=0.29 mm

下列哪条语句正确？（ ） A: double snow[31]=new double[]; B: double snow[31]=new double[31]; C: double snow[]=new Double[31]; D: double[] snow=new double[31];

Beijing won the bid for the 2022 Olympic Winter Games on ( ). A: 31 July 2015 B: 31 July 2016 C: 31 August 2016 D: 31 August 2015

有10个数31、52、63、63、25、31、52、31、63、52，众数是什么？