选用油罐阻火器时,口径与呼吸阀比较,应()。
A、相同
B、小
C、大
D、不作尺寸要求
参考答案:A
Read and fill in the blanks. 读一读,用所给单词的适当形式填空。
1. Look at the in the sky. It is a day. (snow)
2. There are many in the sky. The weather is . (cloud)
3. The is strong. It is a day. (wind)
4. There is much today. The weather is . (rain)
5. Look at the hot . It is today. (sun)
营养性缺铁性贫血时血象及生化特点是()
A.血红蛋白降低为主
B.血涂片见红细胞大小不等,以小细胞为主
C.MCV、MCH、MCHC均减少
D.血清铁蛋白≤12μg/L
E.血清铁<9.0~10.7μmol/L,总铁结合力>62.7μmol/L,有意义