系统产生死锁的四个必要条件是：资源的独占使用、资源的非抢占分配、资源的循环等待和资源

挡渣出钢的目的是减少夹杂、提高合金收得率、提高钢包寿命。

Cannes will rock to the sound of a cancan dance this year when Moulin Rouge by the Australian director Baz Luhrmann opens the French film festival （电影节） in May. The musical stars Nicole Kidman as a singer, and John Leguizamo as the artist Henri de Toulouse-Lautrec. It will be competing for the Palme d'Or, the festival's top prize. The festival runs to May 21.

The American actor Tommy Lee Jones, 54, has married his longtime girlfriend, Dawn Maria Laurel, 36, in a private wedding in San Antonio. "It wasn’t a big to-do, ‘said Fred Biery, a U. S. District Judge who performed the service. He refused to discuss things further. "These are very private people," he said.

Loretta Lynn is being treated for a very bed cold in Tennessee and will miss several appearances. The country singer, 65, was admitted to a hospital near her home in Hurricane Mills. "She is in good condition, but the doctors are watching her closely," a spokeswoman said.

The French-Algerian singer Enrico Macias was named a United Nations peace messenger. Enrico joins eight other people who act as goodwill envoys （使者） for the United Nations, among them are the writer Elie Wiesel and the basketball player Magic Johnson.

73. We can learn from the text that Henri de Toulouse-Lautrec is ______

A. a figure in a film         B. a dancer in a show

C. a country singer                    D. a prize winner

74. We know from the text that_______.

A. Moulin Rouge won the top prize in a film festival

B. Loretta Lynn is under the doctors’ care

C. eight people serve as the UN goodwill envoys

D. Fred Biery was Tommy Lee Jones’assistant

75. This text most probably appears in_____.

A. a book on film stars         B. a film review in a magazine

C. a newspaper              D. a notice

小儿何时能认识妈妈（）。

A.1个月

B.3～4个月

C.4～5个月

D.1～2岁

E.5岁

资产负债表的“应收账款”项目，根据“应收账款”和“预收账款”科目所属明细科目借方余额合计，减去“坏账准备”科目中有关应收账款计提的坏账准备期末余额后的金额填列。 ( )

患者男性，29岁，高血压，伴低钾性瘫痪，血浆醛固酮为82.6pmol/L，赛庚啶试验醛固酮不降低，血肾素—血管紧张素Ⅱ基础值低，对呋塞米+立位无反应，疑诊醛固酮瘤，但双肾上腺CT正常，请指．出下述哪项检查对肿瘤的定位及切除术最具有指导意义

A．肾上腺磁共振
B．超声显像
C．测定血浆18-羟皮质酮浓度
D．放射性碘化胆固醇肾上腺扫描
E．静脉导管取双侧肾静脉血，测定比较醛固酮浓度