在三棱锥的六条棱中任意选择两条，则这两条棱是一对异面直线的概率为（ ） A．120

阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空，并将答案填写在答题卡标号的相应位置上。

Viennese-born composer Frederick Loewe,小题1:        we remember from his classical musicals including “My Fair Lady” and “Camelot”, was not always famous. He studied piano with the great masters of Europe and achieved huge success as a 小题2:           (music) and composer in his early years. But 小题3:         he immigrated to the United States, he failed as a pianist. For a while he tried other types of work including gold mining and boxing. 小题4:_______            he never gave up his dream and continued to play the piano and write music.

During those difficult years, he could not always afford 小题5:        (make) payments on his piano. One day, bending over the keyboard, he could hear nothing but the music that he played with such 小题6:  inspiration. When he finished and looked up, he was astonished to find that he had an audience of three moving men who were seated on the floor.

They said nothing and made no movement toward the piano. Instead, they小题7:       (dig) into their pockets, pooled together enough money for the payment, placed 小题8:      on the piano and walked out, empty handed. 小题9:_________ (move)) by the beauty of his music, these men recognized excellence and responded 小题10:         it..

丁某于2005年5月为其九周岁的儿子丁海购买一份人身保险。至2008年9月，丁某已支付了三年多的保险费。当年10月，丁海患病住院，因医院误诊误治致残。关于本案，下列哪一表述是正确的( )

A．丁某可以在向保险公司索赔的同时要求医院承担赔偿责任
B．应当先由保险公司支付保险金，再由保险公司向医院追偿
C．丁某应先向医院索赔，若医院拒绝赔偿或无法足额赔偿，再要求保险公司支付保险金
D．丁某不能用诉讼方式要求保险公司支付保险金

接收和发送彩信手机报要收流量费吗？

《蒸汽锅炉安全技术监察规程》中规定：焊接接头检查试件必须作全焊缝金属拉伸试验（）

抗毒素的作用是（）

A.能用于细菌性感染的常规预防

B.能阻止细菌粘附

C.能中和内毒素的毒性

D.能中和与易感细胞结合的外毒素的毒性

E.能中和游离外毒素的毒性