问题
填空题
根据句意及首字母提示补全单词
1. There are usually(通常) t_____ days in February.
2. -When is your b_____, Tina?
-It is July 5th.
3. John is fifteen y_____ old.
4. We have an Art F_____ each year.
5. H_____ old is your father?
6. O_____ 1st is our National Day(国庆节).
7. -How much is it?
-It is 20 d_____.
8. The birthday p_____ is October tenth.
9. The sixth month of a year is J_____.
10. The last month of a year is D_____.
答案
1. twenty-eight 2. birthday 3. years 4. Festival 5. How
6. October 7. dollars 8. party 9. June 10. December
500×11的钢管支撑，支撑平面间距为3m，支撑轴线位于地面以下2m。地质条件为：地层为黏性土，土的天然重度γ=18kN/m3，内摩擦角=10°，c=10kPa。地下水位在地面以下1m，不考虑地面荷载。若用朗肯土压力理论(水土合算)和静力平衡法进行计算，则