【判断题】T68镗床的照明灯由控制照明变压器TC提供24V的安全电压。()
【判断题】T68镗床的照明灯由控制照明变压器TC提供10V的安全电压。
【单选题】I watched the man for a long time and wanted to know .
A.
whether I have seen him before
B.
where I had seen him before
C.
that I had seen him before
【单选题】I had not seen him for years,but I_________ his voice on the phone.
【单选题】I kept looking at the man, wondering _______.
A.
whether I have seen him before
B.
whether I had seen him before
C.
that I had seen him before
【单选题】It was no use______ that I had not seen him, so I waved to him.
【单选题】I would have seen him off, had it been possible but I ______ so busy then.