在制定尿铅95%参考值范围时,宜采用的界值为()。
A.
B.
C.<P95
D.≥P95
E.P5
参考答案:C
体表有外骨骼的是[ ]
A.海葵
B.蝗虫
C.蜗牛
D.蚯蚓
补全对话。
A: Have you got a computer??
B: 1._____
A: 2._____
B: I can read and do my homework on it.?
A: How can you do your homework on it?
B: 3._____ and open a new document.?
A: Can you write in it?
B: 4._____
A: How do you give it to our teacher?
B: 5._____
A: That’s great.
A.I can print it.?
B. Yes,I have.?
C. What can you do on it?
D. Switch on the computer?
E. Yes.