【简答题】阅读理解。 Do you need friends? I'm sure your answer is 'Yes, of course. Everybody does!' You need friends when you play and when you work. If you have friends, you will feel happy. If you have no friends....
【单选题】在典型的良、恶性胃溃疡鉴别要点中,哪一项是良性溃疡的特征
【单选题】Do you need to measure oxygen levels before entering an enclosed space?
C.
Yes, but not if you ventilate properly first for 24 hours
D.
Not if you measure for toxic gases
【单选题】工作区面板右上角的 图标表示该工作面板处于( )显示方式。