如果一个不透明的物体是红色的，是因为它只______；如果一个透明的物体是蓝色的

如果点C是线段AB靠近B的黄金分割点，且AC=2，那么AB=           。

通过实验探究的方法对未知事物进行探索是化学学习的一种重要学习方式。请回答下列有关问题：

（1）小明同学在研究某气体（纯净物）的性质时做了如下实验：

“将铜丝绕成螺旋状放在酒精灯火焰上加热，铜丝表面由光亮的红色变化为黑色；趁热将表面变黑的铜丝放人盛有这种气体的集气瓶中并密闭集气瓶，观察到铜丝表面的黑色又变为光亮的红色。”

上述变化中黑色物质是（写名称）______________，根据实验现象推断这种气体可能是（要求写一种）______________。 如果要验证你的推断,在上述密闭的集气瓶中，还需继续进行的实验是（步骤、现象、结论）_____________________________________ 。通过以上探究，该气体具有的化学性质：______________。

（2）为了探究二氧化碳能与水发生反应生成具有酸性的物质，A、B两同学分别设计了探究实验的方案。A同学的实验方案是将二氧化碳通入紫色石蕊试液中，观察溶液的颜色变化，如图甲所示。B同学的实验方案是取四朵用石蕊试液染成紫色的干燥的小花，按图乙进行实验，观察小花颜色变化（紫色石蕊试液遇酸变红色）。

请你对A、B两同学的实验探究方案进行评价：

①哪个同学的方案合理_______________。

②方案合理的理由是________________________________________。

市话网上数据传输期间，在源节点与目的节点之间有一条利用中间节点构成的物理连接线路。这种市话网采用以下哪种交换技术

A．报文交换

B．电路交换

C．分组交换

D．数据交换

TODAY, Friday, November 12

JAZZ with the Mike Thomas Jazz Band at the Derby Arms. Upper Richmond Road West, Sheen, Admission(门票) free.

DISCO. Satin Sounds Disco. Free at the Lord Napier, Mortlake High St., from 8 pm. Tel. 682-1158.

JAZZ. Lysis at the Bull’s Head, Barnes. Admission 60p.

TOMRROW, Saturday, November 13

MUSIC HALL at the Star and Garter, Lower Richmond Road, Putney, provided by the Aba Daba Music Hall company. Good food and entertainment at a fair price. Tel. 789-6749.

FAMILY night out? Join the sing-along at the Black Horse, Sheen Road, Richmond.

JAZZ. The John Bennet Big Band at the Bull’s Head, Barnes. Admission 80p.

THE DERBY ARMS, Upper Richmond Road West, give you Joe on the electric accordion(手风琴). Tel. 789-4536.

SUNDAY, November 14

DISCO. Satin Sounds Disco, free at The Lord Napier, Mortlake High Street, from 8 pm.

FOLK MUSIC at the Derby Arms. The Short Stuff and residents the Norman Chop Trio.

Non-members 70p. Tel. 688-4626.

HEAVY music with Tony Simon at the Bull, Upper Richmond Road West, East Sheen.

TEE DERBY ARMS, Upper Richmond Road West, give you Joe on the electric accordion.

小题1:We can listen to the Norman Chop Trio _________.

A．at the Bull on Saturday

B．at the Black Horse on Saturday

C．at the Derby Arms on Sunday

D．at the Bull’s Head on Sunday小题2:Which telephone number will you ring if you want to enjoy good food and entertainment?

A．682-1158.

B．789-6749.

C．789-4536.

D．688-4626.小题3:The underlined word “fair” in the passage means _________.

A．reasonable

B．low

C．high

D．equal小题4:If this passage is from a newspaper, which section can it be probably taken from?

A．Politics.

B．Economics.

C．Advertisement.

D．Sports.

______是指由个体、家庭和其他社群单位所占据的、应积极保卫不让同种其他成员侵入的空间。