【单选题】听力原文: Our topic today is about fleas that plague all of us who have cats and dogs in our homes. You may be surprised to find out that there are about 1,500 species of fleas, and that each species has ...
A.
They can live in meadows.
B.
They can jump high to get food.
C.
They can live off many different kinds of hosts.
D.
They can survive without eating for many months.
【简答题】下列积分中不能直接使用牛顿—莱布尼兹公式的是( )
【单选题】人民的实践、人民的生活,是文艺作品的源头活水;面向人民、服务人民,是文艺工作的神圣使命。作为知识分子的文艺工作者,同样需要有浓厚的家国情怀、强烈的社会责任感,需要重道义、勇担当。这给文艺工作者的启示是( )1深化文化体制改革,增强全民族文化创造活力2坚持百花齐放的方针,倡导指导思想多元化3创作人民大众所喜闻乐见的文化产品4要坚持为人民服务、为社会服务的方向
【单选题】工程施工结束时的总结材料不包括( C )
【判断题】起重作业按起吊工件重量和长度划分为四个等级。