background:url(2、png),url(1、jpg),url(3、png),url(4、jpg);},表示哪张图片处在最上层() A: 2、png B: 1、jpg C: 3、png D: 4、jpg

【习题8.2-10】已知向量OA=i+3k，向量OB=j+3k，则△OAB的面积为_ A: 19 B: 19/2 C: √19 D: √19 /2

同一个MSC下，整个切换过程由（）共同完成 A: MS、BTS、BBC、MSC B: BTS、BBC、MSC C: BTS、BBC D: MS、BTS、BBC

2/3，4/7，6/11，8/15，( ) A: 1/2 B: 10/19 C: 11/19 D: 11/23

BBC One and BBC Three are the flagship channels of BBC.

background: url(2、png),url(1、jpg),url(3、png),url(4、jpg);},表示哪张图片处在最上层（）。

表达式a=sorted({'2':23, '5':19, '7':12}.values()),则a的值为_______。() A: ['7', '5', '2'] B: [12, 19, 23] C: [23, 19, 12] D: ['2', '5', '7']

Which of the following about the BBC is NOT true? A: The BBC is run under a Royal Charter since its establishment. B: Today the BBC provides more radio broadcasting than television output. C: The BBC provides not only national broadcasting service but also world service. D: The BBC is a private corporation.

‏Which of the following about the BBC is NOT true?‍ A: The BBC is run under a Royal Charter since its establishment. B: Today the BBC provides more radio broadcasting than television output. C: The BBC provides not only national broadcasting service but also world service. D: The BBC is a private corporation.

（ 19 ）10=2