【单选题】While enjoying himself in the amusement theme park, he heard a loud cry of pain; he _____ himself around and ______ to see a girl had fallen off the swing and was crying for help. [ ]
C.
turned; was terrifying
【多选题】以下协议及应用基于 TCP 实现的有( )。(本题共3个选项)
【单选题】一对渐开线直齿圆柱齿轮的正确啮合条件是()。
【判断题】判断正误:一个人的智商得分100分,这说明他的智商得分超级高,智力超群。