一较深基坑，基坑所处地区地下水位高于基坑底标高6m，土渗透系数为0.1～20.0m/d。此基坑宜选用降水方案为()。
A.真空轻型井点
B.喷射井点
C.管井井点
D.截水
参考答案：B
解析：喷射井点降水是在井点管内部装设特制的喷射器，用高压水泵或空气压缩机通过井点管中的内管向喷射器输入高压水(喷水井点)或压缩空气(喷气井点)形成水汽射流，将地下水经井点外管与内管之间的间隙抽出排走。本法设备较简单，排水深度大，可达8～20m，比多层轻型井点降水设备少，基坑土方开挖量少，施工快，费用低。适于基坑开挖较深、降水深度大于6m、土渗透系数为0.1～20.0m/d的填土、粉土、黏性土、砂土中使用。
| 完形填空。 | |||
| My name is Tony. I __1__ in a big store. I don't work __2__ night. I only work __3__ the day. Every morning I __4__ up at six-thirty. I have __5__ breakfast at seven-thirty. After breakfast I __6__ the store. I sell the clothes in the store. We have __7__ clothes at a good price. The red T-shirt is only ten yuan,. These __8__ are two yuan,. Those shorts are __9__ sale. They are five yuan. I usually have lunch at two __10__ have dinner at eight in the store. Then I take a bus to home at eight-thirty.I like my job. | |||
| ( ) 1. A. works ( ) 2. A. in ( ) 3. A. in ( ) 4. A. take ( ) 5. A. an ( ) 6. A. go to ( ) 7. A. lots ( ) 8. A. shirt ( ) 9. A. on ( ) 10. A. but | B. work B. for B. at B. have B. the B. goes B. a lots of B. hat B. in B. with | C. to work C. at C. on C. bring C. / C. goes to C. many C. sweater C. of C. for | D. working D. of D. for D. get D. a D. get D. much D. socks D. with D. and |
