为了求得楼房的高度，在不计空气阻力的情况下，让一个石块从楼顶自由落下，测出下列哪个物理量就能计算出楼房的高度[ ]

A．石块下落第一秒所用的时间

B．石块落地前的瞬时速度

C．石块落地前最后1s内的位移

D．石块通过最后1m位移的时间

The government is to ban payments to witnesses by newspapers seeking to buy up people involved in prominent cases (21) the trial of Rosemary West.
In a significant (22) of legal controls over the press, Lord Irvine, the Lord Chancellor, will introduce a (23) bill that will propose making payments to witnesses (24) and will strictly control the amount of (25) that can be given to a case (26) a trial begins
In a letter to Gerald Kaufman, chairman of the House of Commons media select committee. Lord Irvine said he (27) with a committee report this year which said that self regulation did not (28) sufficient control.
(29) of the letter came two days after Lord Irvine caused a (30) of media protest when he said the (31) of privacy controls contained in European legislation would be left to judges (32) to Parliament.
The Lord Chancellor said introduction of the Human Rights Bill, which (33) the European Convention on Human Rights legally (34) in Britain, laid down that everybody was (35) to privacy and that public figures could go to court to protect themselves and their families.

A. illogicalB. illegal C. improbableD. improper