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【简答题】
The U.S Postal Service (USPS) continues to bleed red ink It reported a net loss of $6billion for fiscal 2016, the 10th straight year its expenses have exceeded revenue Meanwhile,it has more than $120 billion in unfunded liabilities, mostly for employee health and retirementcosts There are many bankruptcies Fundamentally, the USPS is in a historic squeezebetween technological change that has permanently decreased demand for its bread-and-butterproduct, first-class mail, and a regulatory structure that denies management the flexibility toadjust its operations to the new reality. And interest groups ranging from postal unions to greeting-card makers exert self-interestedpressure on the USPS’s ultimate overseer-Congress-insisting that whatever else happens to thePostal Service, aspects of the status quo they depend on get protected This is why repeatedattempts at reform. legislation have failed in recent years, leaving the Postal Service unable topay its bills except by deferring vital modernization. Now comes word that everyone involved---Democrats, Republicans, the Postal Service,the unions and the system‘s heaviest users—has finally agreed on a plan to fix the system Legislation is moving through the House that would save USPS an estimated $ 28.6 billion overfive years, which could help pay for new vehicles, among other survival measures. Most ofthe money would come from a penny-per-letter permanent rate increase and from shifting postalretirees into Medicare The latter step would largely offset the financial burden of annuallypre-funding retiree health care, thus addressing a long-standing complaint by the USPS and itsunion. If it clears the House, this measure would still have to get through the Senate – wheresomeone is bound to point out that it amounts to the bare, bare minimum necessary to keepthe Postal Service afloat, not comprehensive reform. There’s no change to collective bargaining at the USPS, a major omission considering that personnel accounts for 80 percent ofthe agency’s costs. Also missing is any discussion of eliminating Saturday letter delivery. That common-sense change enjoys wide public support and would save the USPS $2 billion per year But postal special-interest groups seem to have killed it, at least in the House. The emerging consensus around the bill is a sign that legislators are getting frightened about a politically embarrassing short-term collapse at the USPS It is not, however, a sign that they’re getting serious about transforming the postal system for the 21st century. 36.The financial problem with the USPS is caused partly by A.its unbalanced budget B.its rigid management C.the cost for technical upgrading D.the withdrawal of bank support According to Paragraph 2, the USPS fails to modernize itself due toA.the interference from interest groups B.the inadequate funding from Congress C.the shrinking demand for postal service D.the incompetence of postal unions The long-standing complaint by the USPS and its unions can be addressed byA.removing its burden of retiree health care B.making more investment in new vehicles C.adopting a new rate-increase mechanism D.attracting more first-class mail users In the last paragraph, the author seems to view legislators withA.respect B.tolerance C.discontent D.gratitude Which of the following would be the best title for the text?A.The USPS Starts to Miss Its Good Old Days B.The Postal Service: Keep Away from My Cheese C.The USPS: Chronic Illness Requires a Quick Cure D.The Postal Service Needs More than a Band-Aid
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【判断题】所有位指示灯的显示状态只能被 PLC 刷新,不能被操作人员直接通过触摸屏手动操作改变。
A.
正确
B.
错误
【单选题】关于函数参数说法正确的是( )。
A.
实参与其对应的形参各自占用独立的内存单元
B.
实参与其对应的形参共同占用一个内存单元
C.
只有当实参和形参同名时才占用同一个内存单元
D.
形参是虚拟的,不占用内存单元
【简答题】满足线性规划问题所有约束条件(包括非负约束)的基解称为 解.
【单选题】关于函数参数,说法正确的是?
A.
实参与其对应的形参各占用独立的内存单元
B.
实参与其对应的形参共同占用一个内存单元
C.
只有当实参和形参同名才占用一个内存单元
D.
形参是虚拟的,不占用内存单元
【单选题】以下关于函数参数说法正确的是
A.
一个函数可以包含任意个参数
B.
一个函数只能包含1个参数
C.
一个函数可以包含2个参数
D.
一个函数可以包含3个参数
【单选题】线性规划问题由线性的目标函数和线性的约束条件(包括变量非负条件)组成。满足约束条件的所有解的集合称为可行解区。既满足约束条件,又使目标函数达到极值的解称为最优解。以下关于可行解区和最优解的叙述中,正确的是( )。
A.
线性规划问题的可行解区一定存在
B.
如果可行解区存在,则一定有界
C.
如果可行解区存在但无界,则一定不存在最优解
D.
如果最优解存在,则一定会在可行解区的某个顶点处达到
【单选题】动物驱虫期间,对其粪便最适宜的处理方法是
A.
深埋
B.
直接用作肥料
C.
使用消毒剂
D.
生物热发酵
【多选题】以下关于函数参数说法正确的是( )
A.
参数是函数对外联系的唯一入口,用户通过参数来控制函数的运行 。
B.
在定义函数时,声明的参数仅在函数内部可见。
C.
如果实参数量少于形参,那么多出来的形参的值默认为undefined
D.
如果实参数量多于形参,那么多出来的实参就不能通过形参进行访问,函数会忽略掉多余的实参。
【单选题】动物驱虫期间,对其粪便最适宜的处理方法是
A.
深埋
B.
直接喂鱼
C.
生物热发酵
D.
直接用作肥料
【单选题】动物驱虫期间,对其粪便最适宜的处理方法是
A.
深埋
B.
直接喂鱼
C.
生物热发酵
D.
使用消毒剂
E.
直接用作肥料
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