问题
单项选择题
下列选项中的变量已正确定义,则表达式不合法的是 ( )
A.'A'%6
B.'n'-3
C.a>=4==b<1
D.'a'=8
答案
参考答案:D
下列选项中的变量已正确定义,则表达式不合法的是 ( )
A.'A'%6
B.'n'-3
C.a>=4==b<1
D.'a'=8
参考答案:D
As viewed from space, the Earth’s distinguishing characteristics are its blue waters and white clouds. Enveloped by an ocean of air consisting of 78% nitrogen and 21% oxygen, the planet is the only one in our solar system known to harbor life. Circling the Sun at an average distance of 149 million km (93 million miles), the Earth is the third planet from the Sun and the fifth largest planet in the solar system. Its rapid and molten nickel-iron core give rise to an extensive magnetic field which, coupled with the atmosphere, shields us from nearly all of the harmful radiation coming from the Sun and other stars. Most meteors burn up in the Earth’s atmosphere before they can strike the surface. The planet’s active geological processes have left no evidence of the ancient pelting it almost certainly received soon after it was formed. The Earth has a single natural satellite-the Moon. |
What two factors help protect the Earth from radiation
A.Magnetic field and atmosphere
B.Rapid spin and molten iron-nickel core
C.The Sun and the Moon
D.Blue waters and white clouds
某工程项目,建设单位通过招标选择了工程施工单位和工程监理单位,并分别签订了工程施工合同和委托监理合同。 该工程项目在实施过程中,形成了许多建设工程文件和档案,以下是该工程项目实施过程中形成的部分工程文件和档案: (1)建设项目列入年度计划的申报文件; (2)分包单位资质报审表; (3)原材料、成品、半成品、构配件设备出厂质量合格证及试验报告; (4)项目建议书审批意见及前期工作通知书; (5)施工组织设计(方案)报审表; (6)单位工程质量评定表及报验单; (7)建设单位工程项目管理部、工程项目监理部、工程施工项目经理部及各自负责人名单; (8)工程款支付申请表。 按照建设工程档案编制质量与组卷方法,工程项目参与各方对该工程项目实施过程中形成的文件资料进行了收集、组卷、验收和移交。 |
( )文件按单位工程、专业、阶段、分部工程组卷。
A.施工文件
B.竣工验收文件
C.施工文件
D.工程前期文件