现金支票可以提取现金，不可以办理转账。 ( )

A multicast router may receive thousands of multicast（）every day for different groups. If a router has no knowledge about the membership status of the（）, it must broadcast all of these packets. This creates a lot of traffic and consumes（）. A better solution is to keep a list of groups in the network for which there is at least one loyal member.（）helps the multicast router create and update this list. For each group, there is one router that has the duty of distributing the（）packets destined for that group. This means that if there are three multicast routers connected to a network, their lists of groupids are mutually exclusive. A host or multicast router can have membership in a group.

A multicast router may receive thousands of multicast（）every day for different groups.

A．packets

B．errors

C．reports

D．alarms

Passage Four

The other day an acquaintance of mine, a gregarious and charming man, told me he had found himself unexpectedly alone in New York for an hour or two between appointments. He went to the Whitney and spent the "empty" time looking at things in solitary bliss. For him it proved to be a shock nearly as great as falling in love to discover that he could enjoy himself so much alone.

What had he been afraid of, I asked myself That, suddenly alone, he would discover that he bored himself, or that there was, quite simply, no self there to meet But having taken the plunge, he is now on the brink of adventure ; he is about to be launched into his own inner space, space as immense, unexplored, and sometimes frightening as outer space to the astronaut. His every perception will come to him with a new freshness and, for a time, seem startlingly original. For anyone who can see things for himself with a naked eye becomes, for a moment or two, something of a genius. With another human being present vision becomes double vision, inevitably. We are busy wondering, what does my companion see or think of this, and what do I think of it The original impact gets lost, or diffused.

"Music I heard with you was more than music. " Exactly and therefore music itself can only be heard alone Solitude is the salt of personhood. It brings out the authentic flavor of every experience.

"Alone one is never lonely: the spirit adventures, walking in a quiet garden, in a cool house, abiding single there. "

Loneliness is most acutely felt with other people, for with others, even with a lover sometimes, we suffer from our differences of taste, temperament, mood Human intercourse often demands that we soften the edge of perception, or withdraw at the very instant of personal truth for fear of hurting, or of being inappropriately present, which is to say naked, in a social situation. Alone we can afford to be wholly whatever we are, and to feel whatever we feel absolutely. That is a great luxury!

For me the most interesting thing about a solitary life, and mine has been that for the last twenty years, is that it becomes increasingly rewarding. When I can wake up and watch the sun rise over the ocean, as I do most days, and know that I have an entire day ahead, uninterrupted, in which to write a few pages, take a walk with my dog, lie down in the afternoon for a long think (why does one think better in a horizontal position), read and listen to music, I am flooded with happiness.

I am lonely only when I am overtired, when I have worked too long without a break, when for the time being I feel empty and need filling up. And I am lonely sometimes when I come back home after a lecture trip, when I have seen a lot of people and talked alot, and am full to the brim with experience that needs to be sorted out.

Then for a little while the house feels huge and empty, and I wonder where my selfish hiding. It has to be recaptured slowly by watering the plants, perhaps, and looking again at each one as though it were a person, by feeding the two cats, by cooking a meal.

It takes a while, as I watch the surf blowing up in fountains at the end of the field, hut the moment comes when the world falls away, and the self emerges again from the deep unconscious, bringing back all I have recently experienced to be explored and slowly understood, when I can converse again with my hidden powers, and so grow, and so be renewed, till death do us part.

What do you think is the main idea of the passage Analyze the overall structure of the passage to support yourself.

某装配式钢筋混凝土简支梁桥位于城市附近交通繁忙公路上，双向行驶，桥面净宽为：净-7+2×0.75m人行道及栏杆，标准跨径为16m，计算跨径为15.5m。设计汽车荷载为公路-Ⅱ级，人群荷载为3.0kN/m²，汽车荷载冲击系数μ=0.245。某根主梁的荷载横向分布系数如图所示。

提示：按《公路桥涵设计通用规范》 (JTG D 60—2004)及《公路钢筋混凝土及预应力混凝土桥涵设计规范》(JTG D 62—2004)解答。

该主梁支点截面由人群荷载产生的剪力标准值(kN)，与下列何项数值最为接近（）

A．13.2

B．13.8

C．14.6

D．12.3

通报有以下特点（）。

A、具有较强的时效性

B、让事实和数据说话，而不过多地阐发和论证道理

C、具有教育性质，主要起宣传教育、沟通情况和交流经验的作用

D、内容单纯，行文简便

热泵式空调器冬天以室内换热器为冷凝器，室外换热器为蒸发器，当单位轴功率制冷量时k=4，每消耗1度电能向室内供热（）。

A.1kWh

B.3kWh

C.4kWh

D.5kWh