对于一级评价项目，对其所在地区气象资料的调查期间，至少应为最近( )年。
A．5
B．4
C．2
D．3
参考答案：D
根据所给音标及释义写出单词。
1. _____ [] a small piece of paper that one sticks on an envelope (信封)
2. _____ [] keep something for a later time
3. _____ [] especially (特别的)
4. _____ [] the most important city of a country or state
5. _____ [] a person from another country
6. _____ [] sure; not doubtful (可疑的)
具有造血功能的结构是
A.骨质
B.骨髓
C.骨膜
D.红骨髓
E.黄骨髓
] a small piece of paper that one sticks on an envelope (信封)
] keep something for a later time
] especially (特别的)
] the most important city of a country or state
] a person from another country
] sure; not doubtful (可疑的)