PART C
Directions: You will hear three dialogues or monologues. Before listening to each one, you will have 5 seconds to read each of the questions which accompany it. While listening, answer each question by choosing A, B, C or D. After listening, you will have 10 seconds to check your answer to each question. You will hear each piece ONLY ONCE.
听力原文: Twins have always been a source of curiosity since they occur once in every eighty-six births. About one-third of all twins are identical, or single egg twins. Identical twins have the same genes and, hence, they have more similarities between them. Some identical twins are of difference to each other. For example, one may be left-handed, the other right-handed. As young children, some identical twins may look very much the same since they will be dressed up by their parents in the same way. But identical twins may think and dress alike even when they axe away from each other. In fact, the same thing happened to some identical twins when they were separated at birth and raised apart. They may pursue the same careers, have the same interests, or die at almost the same time.
In contrast to identical twins, fraternal twins are not necessarily of the same sex. In some families there is a hereditary tendency to produce fraternal twins.
Why do twins arouse our curiosity?
A.They occur once in every one hundred births.
B.They seldom occur.
C.They occur once in every eighty-six births.
D.They will grow up with strange behaviours.
第1题
主要为防止回填土流失设置的抛石棱体,通常采用()断面。
A.梯形
B.矩形
C.三角形
D.锯齿形
第2题
主要为防止回填土流失的抛石棱体通常采用()断面,此时所用的抛石材料最少。
A.三角形
B.梯形
C.锯齿形
第8题
下列天窗在采光系数相同条件下,天窗的开窗面积从低到高的排序,以下哪项正确()。
A.矩形天窗、平天窗、梯形天窗、锯齿形天窗
D.梯形天窗、锯齿形天窗、平天窗、矩形天窗
C.平天窗、锯齿形天窗、矩形天窗、梯形天窗
D.平天窗、梯形天窗、锯齿形天窗、矩形天窗
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