B型超声诊断仪采用()的新技术和新工艺
A.非常多
B.非常少
C.以前
D.较多
参考答案:D
--- Thanks for your dinner .
--- _______________. [ ]
A. You eat well .
B. You are welcome.
C. Sorry , it isn't good .
D. Let's go home .
晶闸管调速电路常见故障中,工件电动机不转,可能是( )。
A.晶体管V35漏电流过大
B.晶体管V37漏电流过大
C.熔断器FU6熔丝熔断
D.晶体管已经击穿