【单选题】下图是“嫦娥一号”在绕月轨道上拍摄的首张月面局部三维景观图。读图回答下题。 专家认为,地球也应像月球一样,曾遭受许多陨石撞击,而目前地球陆地表面却很少发现明显的陨石坑。探究其原因,主要是 [ ]
【简答题】《灵枢•官能》中记载:“针所不为,______。”
【单选题】Create a conversational but professional tone in letters, e-mail messages, instant messages, and memos by
A.
choosing a clear format and effective document layout.
C.
using familiar words, occasional contractions, and pronouns such as you and I .
D.
using slang and abbreviations such as IMHO and BTW.
【单选题】对于一个优秀的专业技术人员来说( )。
B.
不为物欲所惑,不为权势所屈,不为利益所动,始终保持严格的科学精神,也是难能可贵的
【简答题】在链传动布置时,对于中心距较小,传动比较大的传动,应使[填空(1)]边在上,[填空(2)]边在下,这主要是为了防止[填空(3)]。而对于中心距较大,传动比较小的传动,应使紧边在[填空(4)],松边在[填空(5)],这主要是为了防止[填空(6)]。
【判断题】导游服务的内容是导游接待,导游服务的对象是游客。
【单选题】Boeing has announced that as much as 50 percent of the primary structure - including the fuselage and wing - on the 787 will be made of composite materials. composite material means:
A.
the material is made of plastic
C.
the material is made of metal
D.
the material is made of stone
F.
None of the above is true