题目内容

憎水性材料的润湿角（）90º。

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Section CDirections: In this section, you will hear three passages. At the end of each passage, you will hear three or four questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A), B), C) and D).[音频]Questions 16 to 18 are based on the passage you have just heard.16.

A. Everything seemed to be changing.
B. People were formal and disciplined.
C. People were excited to go travelling overseas.
D. Things from the Victorian era came back alive.

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憎水性材料的润湿角（）90º。

材料的抗渗性可以用（ ）表示，也可用（ ）表示。

导热率小于（）W/（m.K）的材料，可称为绝热材料。

表征材料轻质高强的指标是（），表征材料抵抗变形能力的指标是（）。

材料的抗渗性可以用（）表示，也可用（）表示。