容量瓶瓶塞是磨口的，配套出厂，不能互换，以防漏水。
参考答案：对
— Ann is in hospital.
— Oh, really? I ______ know. I ______ go and visit her.
A．didn't, am going to
B．don't, would
C．don't, will
D．didn't, will
气割时预热火焰的长度应根据板料的厚度不同加以调整，火焰性质应采取中性焰。( )
