问题
单项选择题
某土样的天然重度γ=18kN/m3，含水量w=20%，土粒比重ds=2.7，则土的干密度ρd为：
A.15kN/m3
B.1.5g/m3
C.1.5g/cm3
D.1.5t/cm3
答案
参考答案：C
解析：
γd=γ/（1+w）；γd=10ρd。重度的单位为kN/m3，密度的单位为g/cm3或t/m3。
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某土样的天然重度γ=18kN/m3，含水量w=20%，土粒比重ds=2.7，则土的干密度ρd为：
A.15kN/m3
B.1.5g/m3
C.1.5g/cm3
D.1.5t/cm3
参考答案：C
解析：
γd=γ/（1+w）；γd=10ρd。重度的单位为kN/m3，密度的单位为g/cm3或t/m3。
| 阅读理解。 | |||||||||
| Miyazaki Umi lives in Odawara, Japan. The 15-year-old girl has learned a lot about China from her father and her school. She likes Chinese culture very much. She has a dream. She hopes one day she can work in China. Different to Umi, Miyata Natsuiyuki's knowledge of China all comes from a book, Romance of the Three Kingdoms. The novel is well known in Japan. In this 15-year-old boy's mind, Chinese people are like the heroes in the book - they work hard for their dreams. Last week, the two finally got a chance to see China. 2008 is the China-Japan Friendly Exchange Year. Invited by the Suzhou People's Association for Friendship, organized by Japan's Children and Life Culture Association, Umi and Natsuiyuki, together with another 63 Japanese people, made a trip to China. They first went to Shanghai. Then, in Suzhou, they saw Kunqu Opera at the Suzhou Art School. Umi and Natsuiyuki said they have found out something new about the country. In Shanghai, the high buildings amazed Umi. "It seems as if all the tall buildings in Japan are here in Shanghai," she said. Natsuiyuki saw bicycles everywhere in Chinese cities."You don't see that in Japan. I think it's good for the environment to ride bikes." Both the boy and the girl think that people in China are very kind and warm-hearted. "Though we only speak broken Chinese and English, they always answered my questions patiently," said Umi. "If you have any difficulties, they come and help you at once," said Natsuiyuki." Even though you cannot speak the language, you forget you are in a foreign country." | |||||||||
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