高血压患者，伴发心悸（HR99次/分）和劳力性心绞痛时，应首选哪种药物（）
A. β受体阻滞剂
B. 血管紧张素转换酶抑制剂
C. α受体阻滞剂
D. 钙离子拮抗剂
E. 利尿剂
查看答案
For which three events can web application event listeners be registered？（）
A. When a session is created
B. After a servlet is destroyed
C. When a session has timed out
D. When a cookie has been created
E. When a servlet has forwarded a request
F. When a session attribute value is changed
装接容量为315KVA的码头装卸作业动力用电，执行非工业电价。
A. 正确
B. 错误
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