【单选题】When he heard the news , he stared at me ______. [ ]
【单选题】在软件开发过程中占整个软件系统费用最多的是( )。
【单选题】He stared at me ____seeing me for the first time
【单选题】信令网是一个专门用于传送信令信息的网络。
【单选题】对于可见度比较差的演示实验,要使实验现象明显,除了采用机械放大、电放大、光放大或投影放大外,传统的办法不包括( )。
【单选题】I told Johnson the poem was written by me. However ,after hearing this ,he stared at me ________.