It is a violation of the "separation of duties" principle wh

参考答案：正确

正确答案：D
解析：NOTIN表示仓库号不在集合(“wh1”，“wh2”)中。

正确答案：
(b) Separation of the roles of CEO and chairman
Benefits of separation of roles
The separation of the roles of chief executive and chairman was first provided for in the UK by the 1992 Cadbury provisions
although it has been included in all codes since. Most relevant to the case is the terms of the ICGN clause s.11 and OECD
VI (E) both of which provide for the separation of these roles. In the UK it is covered in the combined code section A2.
The separation of roles offers the benefit that it frees up the chief executive to fully concentrate on the management of the
organisation without the necessity to report to shareholders or otherwise become distracted from his or her executive
responsibilities. The arrangement provides a position (that of chairman) that is expected to represent shareholders’ interests
and that is the point of contact into the company for shareholders. Some codes also require the chairman to represent the
interests of other stakeholders such as employees.
Having two people rather than one at the head of a large organisation removes the risks of ‘unfettered powers’ being
concentrated in a single individual and this is an important safeguard for investors concerned with excessive secrecy or
lack of transparency and accountability. The case of Robert Maxwell is a good illustration of a single dominating
executive chairman operating unchallenged and, in so doing, acting illegally. Having the two roles separated reduces
the risk of a conflict of interest in a single person being responsible for company performance whilst also reporting on
that performance to markets. Finally, the chairman provides a conduit for the concerns of non-executive directors who,
in turn, provide an important external representation of external concerns on boards of directors.
Tutorial note: Reference to codes other than the UK is also acceptable. In all cases, detailed (clause number) knowledge
of code provisions is not required.
Accountability and separation of roles
In terms of the separation of roles assisting in the accountability to shareholders, four points can be made.
The chairman scrutinises the chief executive’s management performance on behalf of the shareholders and will be
involved in approving the design of the chief executive’s reward package. It is the responsibility of the chairman to hold
the chief executive to account on shareholders’ behalfs.
Shareholders have an identified person (chairman) to hold accountable for the performance of their investment. Whilst
day-to-day contact will normally be with the investor relations department (or its equivalent) they can ultimately hold
the chairman to account.
The presence of a separate chairman ensures that a system is in place to ensure NEDs have a person to report to outside the
executive structure. This encourages the freedom of expression of NEDs to the chairman and this, in turn, enables issues to
be raised and acted upon when necessary.
The chairman is legally accountable and, in most cases, an experienced person. He/she can be independent and more
dispassionate because he or she is not intimately involved with day-to-day management issues.

正确答案：D

正确答案：B
解析：SQL支持集合的并(UNION)运算，即可以将两个SELECT语句的查询结果通过并运算合并成一个查询结果。为了进行并运算，要求这样的两个查询结果具有相同的字段个数，并且对应字段的值要出自同一个值域(相同的数据类型和取值范围)。所以题干中的SQL语句实现的功能是查询仓库号为WH1或WH2的仓库信息。

正确答案：D
解析：题干中给出的表达式：“仓库号NOT IN(“wh1”，“wh2”)”表示仓库号不是“wh1”并且不是“wh2”。符号“!=”表示的是不等于，因此正确答案为选项D。选项A表示仓库号等于“wh1”并且等于“wh2”，选项B表示仓库号不等于“wh1”或者等于“wh2”。选项C表示仓库号不等于“wh1”或者不等于“wh2”。因此选项 D为正确答案。

正确答案：D
题千中给出的表达式：“仓库号 NOT IN("wh1""wh2")”表示仓库号不是"wh1"并且不是"wh2"。符号“！=”表示的是，不等于，因此正确答案为选项D。选项A表仓库号等于"whl"并且等于"wh2"，选项B表示仓库号不等于"whl"或者等于"wh2"。选项C表示仓库号不等于"whl"或者不等于"wh2"。因此选项D为正确答案。

正确答案：D

正确答案：D
依据题意，本查询应该有两个筛选条件，即“仓库=''WH1 ”OR仓库=“WH2”和“年龄<40”，并且这两个条件要同时满足，也就是说本题应先进行或运算，即先判断“仓库=WH1”OR仓库="WH2””，再将此结果与“年龄<40”的条件进行与运算，又因为与运算比或运算的优先级高，所以要将或运算用圆括号括起来。

正确答案：C
使用分道通航制区域的船舶应尽可能避开分隔线或分隔带。