绘图题:如图所示为负控终端被控开关接线图,(K为负控终端跳闸出口继电器触点),请评价

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问题:

绘图题:如图所示为负控终端被控开关接线图,(K为负控终端跳闸出口继电器触点),请评价图(a)和图(b)的优缺点?

考点:电力负荷控制员电力负荷控制员高级技师电力负荷控制员高级技师题库
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已知函数f(x)=
1
3
x3-ax2+(a2-1)x+b(a,b∈R).
(Ⅰ)若x=1为f(x)的极值点,求a的值;
(Ⅱ)若y=f(x)的图象在点(1,f(1))处的切线方程为x+y-3=0,求f(x)在区间[-2,4]上的最大值;
(Ⅲ)当a≠0时,若f(x)在区间(-1,1)上不单调,求a的取值范围.
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第二节阅读填空(共5小题,每小题2分,满分10分)

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

71      Due to a racial and immigrant population the variety and richness of art and sports is very evident (显而易见的).

Since the Second World War. Canada has produced an impressive amount of writing. From novels to poetry, the selection is wide. Native writers are also becoming better known across Canada in recent years .       72        Everything from country to Pop. Classical to Heavy Rock can be found across Canada and across the glob performed by Canadian artists.  Film Crew in Canada , the National Film Board is the primary producer of movies in Canada.     ----73    Many well-known actors , directors, screen writers and movies come from Canada and often won awards for their work . French art was the first to appear in Canada along the St Lawrence in and around Quebec.     74    Canadian photography as well as painting by Canadians are not well known outside of Canada but recognition is increasing .

75     Hockey is the most popular spectator (观众) sport with more participants taking part. American style football and baseball are also very popular and all of these sports

are played across Canada.

A.However , many Hollywood studios are turning to Canada as a source for location and as an alternative to the more expensive USA.

B.Musicians are reaching a higher level of recognition in the world music scene.

C.Since then the volume of art and artists has increased.

D.Canada has also developed many new kinds of music.

E.Arts and culture is lived and breathed in every corner of Canada .

F.Sport is major part of today’s society in Canada.

G.Few sports can be found in Canada today.

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社交距离通常是指()

A.1.2~4m

B.4m以外

C.50~120cm

D.50cm以内

E.以上都不是

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食品经营场所以及仓储场所不需要按照食品与非食品、生食品与熟食品、散(裸)装食品与预包装食品分开的原则设计布局。

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