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【单选题】
关于苷的叙述，下面哪一点是错误的A.
口服吸收率与结构中羟基的数目呈反比
B.
安全范围小
C.
有正性肌力作用
D.
有负性频率作用
E.
有正性心肌舒张作用
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【单选题】Recently, there’s been much theft in the schools. What security measures shall we take then?
A.
最近，校内发生了盗窃事件，应该采取什么防范措施?
B.
最近，校内盗窃事件不断，怎样防范才是适当的?
C.
最近，校内多次发生盗窃事件，校方该采取什么措施?
D.
最近，校内多次发生盗窃事件，可以采取什么防范措施?
【单选题】Recently, there’s been much theft in the school. What security measures shall we take then?
A.
We can install cameras and set up police line for you.
B.
We can install infrared surveillance cameras and intrusion alarms for you.
C.
We can install alarming system for you.
D.
We can equip techniques and electronic system for you.
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