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【多选题】
根据《中国移动江苏公司网优建设项目验收规范（2011版）》室内分布的覆盖测试原则上要求遍历网优建设项目的各层，但实际上许多相邻楼层覆盖情况接近，故可选典型楼层进行测试。典型楼层的选取原则如下（）A.
大楼的非标准层（专用楼层、一楼大厅、会议楼层）、地下层、停车场为必测层；标准层选择低、中、高层分别测试
B.
每个测试层测试走廊、楼道、电梯厅、公共区域、卫生间以及有代表性房间的窗口边缘区域（距离窗口一）
C.
每个RRU或直放站远端覆盖范围内至少抽测一层
D.
每层电梯均需要进行测试，由进入电梯前开始记录，出电梯进入电梯厅后停止记录
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举一反三
【简答题】______ is not only statistical but also interesting.
【单选题】The evil manners would be ______ root and branch due to the forceful action taken by the local government.
A.
exterminated
B.
exemplified
C.
facilitated
D.
emitted
【单选题】The rising phase of the action potential is due to
A.
Na+ flow into the cell only.
B.
Na+ flow out of the cell only.
C.
K+ flow out of the cell only.
D.
K+ flow into the cell only.
E.
Na+ flow out of the cell and K+ flow into the cell.
【单选题】The rise in the action potential of nerve fibers is due to( )
A.
K+ enters the cell
B.
K+ moves from cell to extracellular
C.
Na+ enters the cell
D.
Na+ moves from cell to extracellular
【单选题】Due to action of pistons some relative motion between parts in contact in the coolant supply and return system must occur.
A.
reciprocating
B.
rotating
C.
running
D.
removing
【单选题】About the forming mechanism of action potential, ascending branch is due to ( )
A.
K+ excurrent flow
B.
K+ incurrent flow
C.
Na+ excurrent flow
D.
Na+ incurrent flow
【单选题】What is the statistical reserve？（）
A.
Bandwidth that is reserved for SVCs to route over a trunk
B.
Bandwidth that is reserved on a trunk so that ABR connections can burst
C.
Bandwidth on a trunk that is reserved for control traffic and cannot be used by connections
D.
Bandwidth that cannot be allocated to connections but can be used to accommodate statistical variations in the traffic
【单选题】The one-way nature of action potential propagation down an axon is primarily due to
A.
sodium ion depletion
B.
potassium ion depletion
C.
the refractory period
D.
ATP loss
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