“问号”的拼音？

“问号”的英语可以翻译为：question mark，interrogation mark ，unknown factor，unsolved problem，interrogation ...

他们的不少期货都还是个问号。A question mark hangs over many of their futures.当局是否允许检查还是个大问号。Whether the authorities will allow inspection is highly doubtful.这个案子还是个问号.This case is still unknown....