【单选题】分为酸式和碱式两种,酸式滴定管主要用于滴定液是酸性溶液、氧化还原溶液和稀盐溶液的容量分析中;碱式滴定管主要用于滴定液是碱性溶液的容量分析中。
【单选题】An owl is a bird with very large eyes. Those eyes make the owl look clever. The owl can not move its eyes freely as we can. Somerimes they can hardly see anything during the day.It can only look strai...
B.
it can’t move its eyes freely as we can
C.
it sees better at night than during the day
D.
it can’t see anything at all during the day
【单选题】下列糖皮质激素类药物属于长效类的药物是:
【单选题】—My foot hurts when I move it. —You must stay in bed and don't move _____ . [ ]
【判断题】验电器使用前应进行外观检查,如发现破损,应禁止使用。
【单选题】下列不属于糖皮质激素类药物的不良反应是( ) A.诱发高血压 B.耳毒性和肾毒性 C.诱发或加重感染 D.动
A.
下列不属于糖皮质激素类药物的不良反应是( ) A.诱发高血压
【单选题】碱式滴定管
A.
下端有一玻璃活塞,用以控制滴定过程中溶液的流出速度
B.
可用刷子蘸取肥皂、洗衣粉、去污粉等洗涤剂直接刷洗