上海市中等职业技术学校寒假作业中职一年级
注：当前书本只展示部分页码答案，查看完整答案请下载作业精灵APP。练习册上海市中等职业技术学校寒假作业中职一年级答案主要是用来给同学们做完题方便对答案用的，请勿直接抄袭。
（
D
）1. When did we first know why we look like other people in our family?
A. In 2000.
B. In 1953.
C. In 1961.
D. In 1860.
答案：D
解析：根据文中“In 1860, Gregor Mendel discovered a special reason why we look the same as other people in our family.”可知，1860年孟德尔发现了我们和家人长得像的原因，所以选D。
（
C
）2. What did the two scientists first discover in 1961?
A. The "map" of DNA.
B. A new illness.
C. A message of DNA.
D. The language of DNA.
答案：C
解析：由文中“In 1961, Marshall Nirenberg and Johann Matthaei found a message in DNA showing how DNA tells the cell (细胞) to build its parts.”可知，1961年两位科学家发现了DNA中的一个信息，所以选C。
（
B
）3. What can we do if we understand some "words" of the language inside the body?
A. Make people get new jobs.
B. Make medicine for illnesses.
C. Make maps of human.
D. Make people less attractive.
答案：B
解析：根据“By understanding what just one 'word' means, we can help save more people from several illnesses.”可知，理解身体内语言的一些“单词”能帮助治疗疾病，即制作治疗疾病的药物，所以选B。
（
A
）4. What do people think of DNA technology?
A. It can cause good or bad results.
B. It can cause only good results.
C. It can cause good results but won't work.
D. It can cause only bad results.
答案：A
解析：文中提到“Most people hope that this will help make better medicine and help sick people. Other people worry that when people begin to know more words and find out lots of other information, we might use it in a wrong way...”，说明人们认为DNA技术既有好的结果也可能有坏的结果，所以选A。
