问题 单项选择题

The government is to ban payments to witnesses by newspapers seeking to buy up people involved in prominent cases such as the trial of Rosemary West.

In a significant (51) of legal controls over the press. Lord Irvine, the Lord Chancellor, will introduce a (52) bill that will propose making payments to witnesses (53) and will strictly control the amount of (54) that can be given to a case before a trial begins.

In a letter to Gerald Kaufman, chairman of the House of Commons media select committee. Lord Irvine said he (55) with a committee report this year which said that self regulation did not (56) sufficient control.

(57) of the letter came two days after Lord Irvine caused a (58) of media protest when he said the (59) of privacy controls contained in European legislation would be left to judges (60) to Parliament.

54().

A.publicity 

B.penalty 

C.popularity 

D.peculiarity

答案

参考答案:A

解析:

A.publicity公众的注意,社会的注目。B.penalty处罚,刑罚,罚款。C.popularity名气,人缘,名望,流行,普及。D.peculiarity独特,古怪,独特性,特性,特质。

实验题

金属的开发和利用是人类文明和社会进步的标志。

我国古代将炉甘石(ZnCO3)、赤铜矿(Cu2O)和木炭粉混合加热至800 ℃左右,即可得到与黄金外观相似的“药金”。

(1)用上述方法不能制得真正的黄金(Au)是因为________________;

(2)“药金”是________(填“纯金属”或“合金”);

钛因常温下不与酸、碱反应等优良的性能,被誉为“未来金属”。由钒钛磁铁矿提取金属钛的主要工艺过程如下:

(3)TiCl4在高温下与足量Mg反应置换生成金属Ti,该反应的化学方程式为:____________________。

(4)上述生产过程中得到的金属钛中混有少量金属杂质,可加入_________________除去。

(5)已知某金属粉末中除含有Al外还含有一定量的替他金属,为了证明金属粉末中含有Fe和Cu,某化学兴趣小组的同学展开了如下的实验探究。

资料在线:Al与氢氧化钠溶液反应生成溶于水的偏铝酸钠和氢气(反应的化学方程式为:2Al+2H2O+2NaOH=2NaAlO2+3H2↑),Fe和Cu不与氢氧化钠溶液反应。

请完成证明金属粉末中存在Fe和Cu的实验设计:

实验操作
实验现象
结论
I.取少量的金属粉末于试管中,加入足量的_______(填试剂名称)。
________________
仅除去铝
II.将试管静置,弃去上层清液,加入足量的稀硫酸。
________________
证明含有铁
III.将试管静置,弃去上层清液,加水,多次洗涤剩余固体
剩余固体呈紫红色
证明含有铜
填空题