题目内容

Which one is the correct answer?

A. She is sad.
B. She is cold.
C. She is ill.
D. She is nervous.

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Directions:In this section you will hear a recorded short passage. The passage is printed on the test paper, but with some words or phrases missing. The passage will be read three times. The first reading is for you to get the general idea. During the second reading, you are required to write down the missing words or phrases according to what you hear in order of numbered blanks. The third reading is for you to check your answer. Now the passage will begin.Family systems evolve (发展,进化) with time and circumstance. Before the industrial revolution (革命), it was1 I that families were closely knitted in terms of social duties and obligations (义务) to2 and were extended.As people migrated (移民) to the newly developing towns to find work in the new factories, they would go and live with family members who were already there.One3 of the industrial revolution in the early days was to extend the family.There was no welfare state to rely on in those days.The4 family type was the “isolated (独立的) nuclear family”. Families in the past were extended and networked in terms of social obligations. The extent to which families today are “isolated”and not networked to other relatives in terms of social obligations5 .

挥发油含有的萜类化合物是（）

A. 单萜
B. 二萜
C. 倍半萜
D. 二倍半萜
E. 三萜

挥发油易溶于（）

A. 乙醚
B. 苯
C. 水
D. 石油醚
E. 二硫化碳

挥发油的化学组成主要包括：

A. 单萜及其含氧衍生物
B. 小分子脂肪族化合物
C. 小分子芳香族化合物，大多是C6-C3骨架的
D. 倍半萜及其含氧衍生物
E. 二萜及其含氧衍生物