下列关于取水构筑物适用的地层条件，正确的是( )。
A．管井适用于含水层厚度大于5m，底板埋藏深度大于15m的地下水
B．大口井适用于含水层厚度在5m左右，底板埋藏深度小于15m的地下水
C．渗渠仅适用于含水层厚度小于6m，渠底埋藏深度小于10m的地层条件
D．泉室适用于有泉水露头，流量稳定，且覆盖层厚度小于5m的情况
参考答案：B,D
解析：管井适用于含水层厚度大于4m，底板埋藏深度大于8m的地层；渗渠仅适用于含水层厚度小于5m，渠底埋藏深度小于6m的地层条件。
Have you been back to the place your ancestors lived, worked, studied and
played? Robert Qian , a Chinese Canadian, already has. Now in China, he has found
that his family like a tall tree with long roots.
Robert is just one young overseas Chinese who to visit his ancestors’
homeland, as part of the In Search of Roots summer camp program. The program by the local government of Guangdong Province. This program started in 1980, and so far has brought overseas Chinese students to China to look for their families’ roots. The young people are usually between 16 and 25 years old. Most, like Robert, can hardly any Chinese and have never been to China before.
The students mainly visit parts of Guangdong Province in southern China. During the camp, they study Chinese culture, see changes that have happened in that area, and visit interesting sights. Going to their ancestors’ village is often part of the trip.The students feel that they are part of the village, and village life. They drink from the village well, go for walks the countryside, and watch the villagers do their daily activities.
Cathy Qian, a young American student, had this to say, “ In Search of Roots, I am beginning to understand my Chinese roots and who I am. It has been a great trip, and I have memories of China to take with me .”
The program leaders believe in the program and say that the purpose of it is to give young overseas Chinese the chance to learn more about . “I’ve really enjoyed the trip so far,” says Robert.“This has been a big step for me, and I’m looking forward to more about my roots during my time here.
| 小题1: | A．where B．what C．that D．which |
| 小题2: | A．where B．was C．is D．are |
| 小题3: | A．has come B．have come C．will come D．are coming |
| 小题4: | A．can be organized B．is organizing C．organizes D．is organized |
| 小题5: | A．thousands B．thousands of C．thousand D．thousand of |
| 小题6: | A．say B．speak C．tell D．talk |
| 小题7: | A．two-week B．two weeks C．two-weeks D．two week |
| 小题8: | A．the most surprising B．the most boring C．more exciting D．the most exciting |
| 小题9: | A．experience B．enjoy C．change D．worry |
| 小题10: | A．though B．across C．cross D．through |
| 小题11: | A．Thanks for B．Thanks to C．Thanks D．Thanks a lot |
| 小题12: | A．much too B．too much C．too many D．so much |
| 小题13: | A．strongly B．hardly C．hard D．heavily |
| 小题14: | A．himself B．herself C．them D．themselves |
| 小题15: | A．finding out B．find out C．helping out D．help out |