【单选题】What does the writer say is an additional problem for entrepreneurs in the fourth paragraph?
A.
They rely on management systems that are out of date.
B.
They will not adept measures that provide long-term solutions.
C.
They have little confidence in the business advice that is available.
D.
They de not take market changes into account when drawing up business plans.
【单选题】What does the writer say is an additional problem for entrepreneurs in the fourth paragraph?
A.
They rely on management systems that are out of date.
B.
They will not adopt measures that provide long-term solutions.
C.
They have little confidence in the business advice that is available.
D.
They do not take market changes into account when drawing up business plans.
【判断题】普通感冒治疗包括缓解感冒症状、注意休息、适当补充水分、保持室内空气流通等。
【单选题】By the late 7the century, ____ became the dominant religion in England.
B.
Anglo-Saxon Christianity
【多选题】下面的房屋建筑中荷载中属于可变荷载的是()。
【多选题】航空发动机作为高端核心的装备,其工作原理包括以下哪几个步骤?( )
A.
空气通过进气道减速增压,并以最小的流动损失进入到压气机。
B.
压气机以高速旋转的叶片对空气做功压缩空气,提高空气的压力。
C.
高压空气进入燃烧室,在燃烧室内与燃油充分混合后燃烧,产生高温高压的气体进入涡轮。
D.
高温高压的气体首先在涡轮中膨胀,推动涡轮高速旋转带动风扇(涡扇发动机的主要推力由风扇产生)和压气机。
E.
随后燃气在尾喷管中继续膨胀,提高燃气速度,使之高速喷出,产生推力。
【多选题】航空发动机作为高端核心的装备,其工作原理包括以下哪几个步骤?
A.
空气通过进气道减速增压,并以最小的流动损失进入到压气机。
B.
压气机以高速旋转的叶片对空气做功压缩空气,提高空气的压力。
C.
高压空气进入燃烧室,在燃烧室内与燃油充分混合后燃烧,产生高温高压的气体进入涡轮。
D.
高温高压的气体首先在涡轮中膨胀,推动涡轮高速旋转带动风扇(涡扇发动机的主要推力由风扇产生)和压气机。
【简答题】光合作用可分为光反应和暗反应两个过程,发生的场所分别是( )和( )。