问题
选择题
下列物质既能使酸性高锰酸钾溶液褪色，又能使溴水褪色，还能和氢氧化钠反应的是（ ）
A．乙酸
B．乙酸甲酯
C．油酸甘油酯
D．苯甲酸
答案
答案：C
搜题请搜索小程序“爱下问搜题”
下列物质既能使酸性高锰酸钾溶液褪色，又能使溴水褪色，还能和氢氧化钠反应的是（ ）
A．乙酸
B．乙酸甲酯
C．油酸甘油酯
D．苯甲酸
答案：C
| 完形填空。 | |||
| Mark Twain was pen name of Samuel Lamghorne Clemens.He was born on November 30,1835,in a small town in Florida ,the USA/He ___1___a few naughty boys who later ___2 __ in his tories. At the age of 12,his father died,and he began to work,first as a printer,then on a river boat .Those years on the boat went into his book“Life ___3___the Mississipi”。 ___4___the Civil War he worked as a reporter and used Mark Twain as his pen name .The stories he wrote in this period ___5___him famous and popular. He made lot of money by writing ,lecturing and running ___6___publishing house .But he spent all of it on high living and ___7___ bisiness. Mark Twain ___8___as a "funny man ".But in fact he took a serious view of life . Many sad things happened in his own life .All his ___9___ helped to shape his stories ___10___ showed the dark side of society. He died as an old man of 75 in 1910. | |||
| ( )1.A.grew ( )2. A.turned ( )3. A.on ( )4. A.While ( )5. A.made ( )6. A.him ( )7. A.success ( )8. A.knew ( )9. A.challenges ( )10. A.who | B.grew up B.became B.in B.During B.kept B.himself B.successful B.was known B.experiences B.where | C. grew up with C.appeared C.at C.For C.served C.his C.successfully C.was knowing C.happiness C.which | D. grew up in D.disappeared D. for D.Since D.encouraged D.his own D.unsuccessful D. was to be known D.sadness D.in which |