【单选题】【消耗次数：1】
慢性心功能不全时，用强心甙治疗，它对心脏的作用属于
①
局部作用
②
普遍细胞作用
③
继发作用
④
选择性作用
⑤
以上都不是
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相关题目
【单选题】
药物作用的选择性应是
①
药物集中在某靶器官多都易产生选择作用
②
器官对药物的反应性高或亲和力大
③
器官的血流量多
④
药物对所有器官、组织都有明显效应
⑤
以上都对
【单选题】
关于药物作用的选择性，下列描述错误的是
①
选择性是相对的，随剂量增加，选择性会降低
②
选择性的高低可以影响药物的作用范围
③
选择性高的药物针对性较强
④
选择性低的药物副作用较少
随机题目
【单选题】
19. Your room is ____ mine.
①
twice as large
②
twice the size of
③
bigger twice than
④
as twice large as
【单选题】
4. I think the story is not so ____as that one.
①
interesting
②
interested
③
more interesting
④
most interesting
【单选题】
3.This book is ____that one, but ____than that one.
①
as difficult as; expensive
②
as more difficult as; more expensive
③
as difficult as; more expensive
④
more difficult as; as expensive
【单选题】
20. Your room is ____ than mine.
①
three time big
②
three times big
③
three times bigger
④
bigger three times
【单选题】
18. The earth is about ____ as the moon.
①
as fifty time big
②
fifty times as big
③
as big fifty times
④
fifty as times big
【单选题】
15.–What’s your brother like? –He is____.
①
a driver
②
very tall
③
my friend
④
at school
【单选题】
6. I think science is ____than Japanese.
①
much important
②
important
③
much more important
④
more much important
【单选题】
5. His father began to work ____he was seven years old.
①
as old as
②
as early as
③
as soon as
④
as much as