铺设沙石反滤层时,粗沙层之上应铺盖()。
A.碎石(大石子)
B.细沙
C.细石(小石子)
D.块石
参考答案:C
根据句意和汉语提示,在空缺处填入单词
1. How many ________(科目) do you study at school ?
2. Getting up early in the morning is good for our ________(健康).
3. Look ,there is lot of ________(来往车辆) on the road .
4. They spent the ________(整个的) day playing in the World Park .
5. Who can see the ________(美丽) of this picture?
下列不符合正常骨髓象特征的是 ()
A.粒红比例为5:1
B.早幼粒细胞<5%
C.红系占有核细胞的20%
D.原始淋巴细胞和幼稚淋巴细胞罕见
E.全片可见巨核细胞15个