第一章 单元测试

1、单选题:
1 . 下列( )不属于燃烧的发生必须具备的三要素。
选项:
A:助燃物
B:可燃物
C:点火源
D:未受抑制的链式反应
答案: 【未受抑制的链式反应点我阅读全文

第一章 单元测试

1、单选题:
为系统的输入信号, 为系统的零状态响应,则下列系统中( )是非时变系统。
选项:
A:.w66685962255s .brush0 { fill: rgb(255,255,255); } .w66685962255s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w66685962255s .font0 { font-size: 406px; font-family: "Times New Roman", serif; } .w66685962255s .font1 { font-style: italic; font-size: 260px; font-family: "Times New Roman", serif; } .w66685962255s .font2 { font-style: italic; font-size: 406px; font-family: "Times New Roman", serif; } .w66685962255s .font3 { font-size: 373px; font-family: Symbol, serif; } .w66685962255s .font4 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } []0.5[] k ykxk =
B:
C:.w66685962275s .brush0 { fill: rgb(255,255,255); } .w66685962275s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w66685962275s .font0 { font-size: 406px; font-family: "Times New Roman", serif; } .w66685962275s .font1 { font-style: italic; font-size: 406px; font-family: "Times New Roman", serif; } .w66685962275s .font2 { font-size: 373px; font-family: Symbol, serif; } .w66685962275s .font3 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } ()() yttxt =
D:.w66685962232s .brush0 { fill: rgb(255,255,255); } .w66685962232s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w66685962232s .pen1 { stroke: rgb(0,0,0); stroke-width: 19; stroke-linejoin: round; } .w66685962232s .font0 { font-size: 406px; font-family: "Times New Roman", serif; } .w66685962232s .font1 { font-style: italic; font-size: 406px; font-family: "Times New Roman", serif; } .w66685962232s .font2 { font-size: 373px; font-family: Symbol, serif; } .w66685962232s .font3 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } () ()2 dxt yt dt =
答案: 【.w66685962232s .brush0 { fill: rgb(255,255,255); } .w66685962232s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w66685962232s .pen1 { stroke: rgb(0,0,0); stroke-width: 19; stroke-linejoin: round; } .w66685962232s .font0 { font-size: 406px; font-family: "Times New Roman", serif; } .w66685962232s .font1 { font-style: italic; font-size: 406px; font-family: "Times New Roman", serif; } .w66685962232s .font2 { font-size: 373px; font-family: Symbol, serif; } .w66685962232s .font3 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } () ()2 dxt yt dt =点我阅读全文

第一章 单元测试

1、多选题:
唐帝国是当时世界上最强盛的封建帝国,同时期世界上主要的封建帝国有( )
选项:
A:拜占庭帝国(东罗马帝国)
B:印度
C:阿拉伯帝国
D:法兰克王国
E:波斯帝国萨珊王朝
答案: 【拜占庭帝国(东罗马帝国);
印度;
阿拉伯帝国;
法兰克王国;
波斯帝国萨珊王朝
点我阅读全文

第一章 单元测试

1、单选题:
生态学是研究( )的科学。
选项:
A:生物与非生物之间的关系
B:生物与环境之间关系
C:生物环境与非生物环境之间的关系
D:生物与生物之间关系
答案: 【生物与环境之间关系点我阅读全文