【判断题】对于常用的S9012、S9013、S9014、S9018、S8550、S8050等型号的三极管,外形识别的方法是:用手拿着三极管,有字的一面(即平面)朝着自己,从左到右3个引脚依次为E 、B、 C 。
【单选题】听力原文:W: Why don't you go into the room? M: Oh, my key won't turn in the lock. Will you help me? Why doesn't the woman go into the room?
A.
She can't unlock the door.
C.
She wants to wait till the man comes.
【简答题】Why don't you go skating today?(改为同义句) ______ ______go skating today?
【单选题】保护地桃坐果部位的新梢,当长到多少时摘心,以控制新梢生长与果实发育争夺养分。
【判断题】S 结合蛋白不能阻止 C5b6789n 中的 C8 与 C9 结合,从而不可避免地危及自身细胞膜的损伤作用。
【简答题】A:Why don't you go to an estate agent, then, you're talking face to face? B:Well, ( ). A: I would like B: That's a shame C: I don't know
【简答题】金属铝能否从水溶液中置换出铜?下面的反应能否自发进行? 2Al(s)+3Cu2+(aq,c=1 mol.dm-3)→3Cu(s)+2Al3+(aq,c=1 mol.dm-3)