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【单选题】
酚妥拉明治疗顽固性心力衰竭的药理学基础是()A.
扩张外周小动脉,降低心脏后负荷
B.
扩张外周小静脉,降低心脏前负荷
C.
兴奋心脏,心排血量增加
D.
抑制心脏,降低心肌耗氧量
E.
抑制心胜,扩张血管
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皮皮学刷刷变学霸
举一反三
【单选题】What can be inferred from the story?
A.
Many people in the city have mobile phones.
B.
The thief would rather pick up six years of hard labor.
C.
The thief would have escaped being caught if he hadn't sold the stolen phone.
D.
The two agers set the unique ring on purpose.
【单选题】With the development of technoledge, ____ mobile phones have more functions, rather than _____ means of communication.
A.
/; a
B.
/; the
C.
the; /
D.
a; /
【单选题】Mobile phones have become an____part of our lives.
A.
dispensable
B.
indispensable
C.
necessary
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