【单选题】What Tom did made his mother _______. [ ]
【单选题】Keeping healthy is more important than . [ ]
【单选题】My English teacher went into the classroom as if _____. [ ]
【简答题】Recordings of angry bees are enough to send big, tough African elephants running away, a new study says. Beehives (蜂窝)-either recorded or real-may even pr elephants from damaging farmer's crops. ...
【判断题】各课题组长是各自实验室的安全责任人,根据各自实验室的工作特点制订具体的安全操作细则,落实学校和系各项安全措施,经常对学生等有关人员进行安全教育,并设立组内安全员。
【单选题】侧棱垂直于底面且底面是正三角形的三棱柱叫做正三棱柱。如图,正三棱柱ABC-A′B′C′的底面边长为 ,高为2,一只蚂蚁要从顶点A沿三棱柱的表面爬到顶点C′,若侧面AA′C′C紧贴墙面(不能通行),则爬行的最短路程是 [ ]