题目

有一种“十五肽”的化学式为CxHyNzOdSe（z＞15，d＞16）．已知其彻底水解后得到下列几种氨基酸： HCOOCCH2CH（NH2）COOH ﹣CH2CH（NH2）COOH 天门冬氨酸（C4H2NO4）      苯丙氨酸（C9H11NO2） H2NCH（CH2SH）COOH H2N（CH2）4CH（NH2）COOH 半胱氨酸（C3H7NSO2）    赖氨酸（C6H14N2O2） 下列有关说法中不正确的是（ ） A．水解可得e个半胱氨酸 B．水解可得个天门冬氨酸 C．水解可得z﹣15个赖氨酸 D．水解时消耗15个水分子                              阅读下面的短文，在标有序号的空白处填入一个适当的词，或填入括号中单词的正确形式，并将相应答案写在答题纸上。 So why has English changed 　　(1)　　 time?　　(2)　　 all languages change and develop when cultures meet and 　　(3)　　 with each other．At first the English spoken in England between about AD 450 and 1150 was very 　　(4)　　 from the English spoken today．It was 　　(5)　　 more on German than the English we speak at present．Then gradually between about AD 800 and 1150, English became 　　(6)　　 like German because those who ruled England spoke first Danish and later French．These new settlers 　　(7)　　(rich)the English language and especially its 　　(8)　　．In 1620 some British settlers moved to America．　　(9)　　(late)in the 18th century some British people were taken to Australia too．English began to be 　　(10)　　 in both countries．