将木块压入水中时，在没有浸没之前，木块受到的浮力越来越 _________ ，浸没以后，浮力 _________ ．
大；不变
The nurse is teaching a client about using vaginal medications. The nurse should instruct the client to （）.
A．use a tampon after insertion to increase medication absorption.
B．release and pull up on the applicator before removal.
C．never refrigerate suppositories.
D．use only a water-soluble lubricant when inserting a suppository.
哪种寄生虫可引起小细胞低色素性贫血（）
A.似蚓蛔线虫
B.毛首鞭形线虫
C.钩虫
D.蠕形住肠线虫
E.丝虫
