题目

阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。Nowadays 5G is very popular among customers，but China is looking past 5G and intending【1】(build)a 6G network. China is starting research into 6G，【2】(make) it one of the first countries to do so. The actual development of 6G wilt【3】 (official) begin in 2020，but the commercial use will have to wait.The 【4】 (arrive)of 5G has attracted a lot of people. It not only brings fast mobile Internet，but also【5】 (enable)us to connect with machines. So 【6】is 6G supposed to bring，es在△ABC中，已知tanA=33，cosB=22，则△ABC的形状为（　　）A．锐角三角形B．钝角三角形C．直角三角形D．不能确定