开关柜出厂试验,40.5kV真空断路器合闸弹跳时间不应大于()ms。
A.1
B.2
C.3
D.4
参考答案:C
用所给词的适当形式填空。
1. Would your sister like some _______ (mutton)?
2. There are many different _______ (kind) of noodles in our restaurant.
3. He likes eating _______ (potato)a lot.
4. My mother often cooks _______ (tomato) noodles for us.
5. How much _______ (fish) would he like to have for lunch?
缺铁性贫血的血象是()
A.小细胞低色素性贫血,血红蛋白降低,白细胞、血小板均正常
B.正细胞性贫血,全血细胞减少
C.血小板计数减少,白细胞计数可正常
D.白细胞计数明显增高,各阶段的中性粒细胞均增高
E.白细胞可高、可低、亦可正常