根据对话内容,从方框内选择恰当的句子填入对话相应的空白处,使对话完整,合乎情景(有两个多余选项)。A:Hello,Mike! What's the time?B:____ A:Where’s Bob? I can't find him.B:I don't think he can come.A:____ B:He has to look after his sister.A:____ B:She doesn't feel well.A:____ Did she go to see the doctor?B:Yes.A:____ B:The doctor said nothing serious,but she has to rest.
如图,下列判断中错误的是( )
步骤一:用木板做成一个支架,分别将两个螺丝钉穿过支架顶端的木板固定好,将电源的正、负极导线分别连接到两个螺丝钉上;
步骤二:将漆包线绕成一个长方形的线圈,两端预留出 10cm 左右,在漆包线两端的适当位置辞掉绝缘漆并做成弯钩挂在螺丝钉上,以使连接线圈的导线只在竖直位置附近时电路处于导通状态;
步骤三:在线圈正下方放置一块永磁铁.