下列是对OptiX2500+板位配置原则的描述，正确的是（）。

A.线路板速率高的优先插放，先光口后电口（SQE因与支路板表现相同除外），尽量空出占用总线多的槽位IU5、IU6、IU7、IU8，同时由中间向两边插放。对于组成复用段环的线路板应使用对偶板位

B.2M支路板因扩容走线的原因，按照先两边后中间的插放方式即IU1－IU2－IU12－IU11－IU3－IU4－IU10－IU9。

C.有TPS保护时，优先插放单板到保护板位，然后再按照优先级的顺序插放单板。

D.配置TPS保护的同时还需要特别注意的是IUP和IU12板位所插单板占用的总线总和不能超过4个VC4。

In the rarefied world of the corporate board, a good network matters. (1) often involves word-of- mouth recommendations: getting on a (2) is easier if you have the right connections. New research suggests men use (3) better than women.

Marie Lalanne and Paul Seabright of the Toulouse School of Economics (4) the effect of a network on (5) using a database of board members in Europe and America. They find that if you were to compare two executive directors, (6) in every way except that one had 200 ex-colleagues now (7) boards and the other 400, the latter, (8) , would be paid 6% more. For non-executives the gap is 14%.

The really (9) finding concerns the difference between the sexes. Among executive-board members, women earn 17% less than their male (10) . There are plenty of plausible explanations for this (11) , from interruptions to women’s careers to old-fashioned (12) . But the authors find that this pay gap can be fully (13) by the effect of executives’ networks. Men can leverage a large network into more senior positions or a seat on a more (14) board; women don’t seem to be able to.

Women could just have (15) connections with members of their networks. "Women seem more inclined to build and rely on only a few p relationships," says Mr. Seabright. Men are better at developing (16) acquaintances into a network, and better at maintaining a high personal (17) through these contacts. Women may, of course, also be hurt by the existing (18) of men on boards and a male (19) for filling executive positions with other men. But a tendency to think of other men first will be (20) if talented women don’t stay on the radar. (289 words)

6（）

A．identical

B．similar

C．differential

D．distinctive