She______ a book when the doorbell rang.
A. reads
B. has read
C. was reading
某住宅小区附近新建了一座酿酒厂，由此引起的该住宅小区房地产价值贬损属于( )。
A. 物质折旧
B. 功能折旧
C. 经济折旧
D. 会计折旧
The primary purpose of the passage as a whole is to ______.
A. describe an initiative and propose its continuance
B. chronicle a development and illustrate its inconsistencies
C. identify a trend and suggest its importance
D. summarize a process and question its significance
有内在拟交感活性的β受体阻断剂是
A. 拉贝洛尔
B. 美托洛尔
C. 吲哚洛尔
D. 阿替洛尔
E. 普萘洛尔
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