题目

欲除去下列物质中混入的少量杂质（括号内物质为杂质），不能达到目的的是（    ） A．乙酸乙酯（乙酸）：加饱和碳酸钠溶液，充分振荡静置后，分液 B．乙醇（水）：加入新制生石灰，蒸馏 C．苯甲酸（NaCl）：加水，重结晶    D．乙酸（乙醇）：加入金属钠，蒸馏 答案：D Peng Jiangya, a 24-year-old girl, was born in Guizhou Province. She lives in a village of the Yinjiang Tujia and Miao Autonomous County(自治县)at the foot of the Fanjing Mountains on the Yunnan-Guizhou Plateau（高原）. Twenty-two years ago, One day her parents were out, she fell into a fire stove at home, and the fire burned her fingers badly. The family was too poor at the time to afford the expensive medical treatment ,at last she lost all her fingers."When I was a child, I was unable to hold chopsticks. My parents taught me for a long time. It was really difficult, but I tried it over and over again ,and at the age of seven, I overcame it. From then on I knew that one had to put great efforts into what she was doing,” said PengJiangya.As a child , PengJiangya often saw others make cross-stitch (十字绣) and then she decided to learn how to make it herself. “ Of course, it took me many years to do that, when I was 18, I got it.” Said Peng. Now she can make as good cross-stitch works as her companions(同伴),but she is faster than other people.Her hometown of Yinjiang Tujia at the foot of the Fanjing Mountains on the Yunnan-Guizhou Plateauhas become a tourist attraction. As for her future, Peng Jiangya said: "I will gather a few other people to embroider(绣) the beautiful landscape of our hometown as a souvenir and lasting memory for tourists. At the same time, we can make more money."1.. Peng Jiangya was born .A. in Guizhou County B. in a poor familyC. when her parents were out D. in 19902.PengJiangya lost all her fingers, when .A. she was 22 years old B. she was 13 years oldC. when her parents were at home D. she was at an early age3. When Peng Jiangya was a child, she learned to without fingersA. use chopsticks by herselfB. make more money by herselfC. make cross-stitch by herselfD. help her parents hold chopsticks4. Now PengJiangya can make .A. better cross-stitch works and faster than her companionsB. the best cross-stitch works in her hometownC. good cross-stitch works and faster than othersD. the most beautiful cross-stitch works in his hometown5. From this passage, we know that PengJiangya learn to make cross-stitch .A. easily B. hardlyC. with great efforts D. without any difficulties