伸直型孟氏骨折多见于（）。
A.幼儿
B.儿童
C.青少年
D.成人
E.老年人
参考答案：B
解析：
伸直型孟氏骨折多见于儿童。
You ______these parcels yourself. The shop would have delivered them if you had asked them. [ ]
A. needn't have carried
B. mustn't have carried
C. should have carried
D. could have carried
渡槽、倒虹吸管进出口连接段多才用砌石护坡或挡土墙，反滤层出现损坏，采取开挖回填措施的回填土（）。
A、能采用黏性土或黏壤土
B、不能采用黏壤土
C、可以采用砂
D、可以采用细砂土
