不清洁提单是指承运人在签发提单时，对货物的包装等状况加注不良批注的提单。
参考答案：对
You don't need _____ your watch oiled. It works quite well and doesn't need _____ .[ ]
A. to have, oiling
B. having, oiling
C. having, to be oiled
D. to have, being oiled
2岁以内小儿乳牙数目约等于月龄减4～6。
