金瓷冠的基底冠厚度至少为()
A.0.1mm
B.0.2mm
C.0.3mm
D.0.5mm
E.1.0mm
参考答案:D
A 56Kbps Modem is a device that translates the ()signals from your computer into analog signals that can travel over a standard phone line,and it can sends data at 56,000 bits per second.
A.mouse
B.voice
C.analog
D.digital
下列表述中,属于我国南方地区的是[ ]
A.男女老少都喜欢饮酒
B.森林宝库,温带果园
C.游泳、赛龙舟是本地居民擅长的运动
D.煤、石油、铁矿丰富,有全国最大的煤炭能源基地