21.I hope I can become healthier next month. A: since B: that C: as D: where

21.I come to meet _____ plane. _____ plane has arrived at the airport now. A: a, A B: the, The C: an, The D: a, The

以下哪个可能是红外发射管? <img src="http://static.cnmooc.org/repositry/umeditor/i/1809/21/3ae9e2e59549454a9b070ff118168864.jpg" />|<img src="http://static.cnmooc.org/repositry/umeditor/i/1809/21/394f173e66bd4376b5fcef9c399105b6.jpg" />|<img src="http://static.cnmooc.org/repositry/umeditor/i/1809/21/502a44e8f77f40078a8d9519a1e6923a.jpg" />|<img src="http://static.cnmooc.org/repositry/umeditor/i/1809/21/dd21e7635f994ad1a0134d620715fb1f.jpg" />

肌节的组成是（） A: 1/2A带+I带+1/2A带 B: A带+I带 C: 1/21带+A带+1／21带 D: I带+A带+I带

运行下面程序的结果是：__________。s=0i=1while s!=100: s=s+i i=i+2print(i,s) A: 21 100 B: 20 100 C: 100 21 D: 100 20

I cannot accept the 21）________ that we have no alternative but to make peace with this company.

一台路由器的静态路由表中有如下四个项： A: 目的网络 B: 端口 C: 202.87.96.0／21 D: 1 E: 202.87.104.0／21 F: 1 G: 202.87.112.0／21 H: 1 I: 202.87.120.0／21 J: 1

若有定义和语句：inta[3][3]＝{{3,5},{8,9},{12,35}},i,sum=0；for(i=0;i<3;i++)sum+=a[i][2-i];则sum=21。

一条肌节的组成是（） A: I带+A带 B: 1/21带+1/2A带 C: 1/2A带+I带+1/2A带 D: 1/2I带+A带+1/21带

下面代码的输出结果是()。inti=10;ints=i++;i=s+i++;Console.WriteLine(i); A: 11 B: 21 C: 22 D: 10