题目内容
（请给出正确答案）
2 (a) Explain the term ‘backflush accounting’ and the circumstances in which its use would be appropriate.
(6 marks)
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A.zhangsan：Pu4#$h*2!1
B.huawei：huawei@123
C.teleadmin：te!e@dmin
D.zhangsan：zhangsan100
对下面的文法G：
E-＞TE'
E'-＞+E|ε
T-＞FT'
T'-＞T|ε
F-＞PF'
F'-＞*F'|ε
P-＞(E)|a|b|^
(1)计算这个文法的每个非终结符的FIRST集和FOLLOW集。(2)证明这个方法是LL(1)的。
please draw the transistor level schematic of a cmos 2 input AND gate and
explain which input has faster response for output rising edge.(less delay
time)。（威盛笔试题circuit design-beijing-03.11.09）
A.隧道切换到HSB路径后，延迟重算主路径Isp的时间
B.隧道切换到HSB路径后，延迟重建主LSP BFD的时间
C.隧道切换到option 2后，延迟重算option 1主路径的时间
D.若不配置此延时，可能由于故障后协议还没有收敛，不能算出有效的主路径Isp
Directions:
You want to apply for the following job: a personal secretary to the general manager, write a letter to Mr. Byron to:
1) show your interest,
2) describe yourself, and
3) explain why you would be suitable for the job.
You should write approximately 100 words. Do not sign your own name at the end of your letter,use “Wang Lin ” instead.
已知某控制系统的方框图如图6-21所示，欲使系统在反馈校正后满足如下要求:
(1)速度稳态误差系数Kv≥5s-1;
(2)闭环系统阻尼比ξ=0.5;
(3)调节时间te(5%)≤2s。
试确定前置放大器增益k1及测速反馈系数kt(kt要求在0~1间选取)。
说明下述各项中每一对之间哪个更富有价格弹性:
(1)某一特定品牌牙膏的需求与普通牙膏的需求;
(2)短期内汽油的需求与长期内汽油的需求。
Explain which of the following items in each pair is more price elastic.
a. The demand for a specific brand of toothpaste and the demand for toothpaste in general
b. The demand for gasoline in the short run and the demand for gasoline in the long run
