最常使用的支抗有（）支抗、（）支抗和（）支抗。
参考答案：颌内‖颌间‖颌外
在郊外成功播出一场盛大歌舞后，被世界公认为电视诞生日的国家是
A．英国
B．法国
C．德国
D．美国
Between 1897 and 1919 at least 29 motion pictures in which artificial beings were portrayed ______ .
A．had produced
B．have been produced
C．would have produced
D．had been produced
