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波长λ＝600 nm的单色光垂直照射到牛顿环装置上，第二个明环与第五个明环所对应的空气膜厚度之差为____________nm．(1 nm=10-9 m)

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Choose the appropriate combined adjectives to complete the following sentences according to the Chinese meaning. You can use the knowledge you have learned in the mini-lecture. （填入所选答案的大写字母）A. 2.5-micrometerB. long-rangeC. long-termD. water-borneE. water-needyF. energy-savingG. water-transferH. week-longI. hoped-forJ. moon-shot(1) During a __1_（为期一周的）trip to China in January this year, ...(2)The value of China’s 2__（节能的）and environmental industries.(3)With concentrations of _3_(2.5微米）particles that were 20times the level considered safe by the WHO.(4) I suspect that this was the 4__(期望的）intent when....(5) If the _5__(长期的）result is that ....(6) building cross-continent _6（输水的）aqueducts....(7) it would be in the 7_（长期的）interest of humanity....(8) that was one month before this famous _8（登月）speech.(9)there are many 9_（饮水传染的）diseased that people die of.(10) The Ministry of Water Resources reported in 2002 that nearly two-thirds of China’s cities are “10 ”（缺水的）....

下列哪一项不属于桥梁总体规划设计的基本内容。()。

A. 桥位选定
B. 桥梁总跨径的确定
C. 桥型选定
D. 桥梁荷载统计

桥梁纵断面设计主要确定( )。

A. 桥梁的总跨径
B. 桥梁分孔
C. 桥道标高
D. 桥下净空
E. 桥上及桥头引道纵坡
F. 基础埋深

桥梁横断面布置主要是( )的布置。

A. 桥面线形
B. 桥面净空
C. 桥面宽度
D. 桥跨结构横截面