为了避免混淆，十六进制数在书写时常在后面加上字母______。
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在建筑物剩余经济寿命晚于土地使用权剩余期限结束的情况下，出让合同已约定不可续期的，应以建筑物剩余经济寿命为收益期限。( )
A. 对
B. 错
Questions 19 to 21 are based on the conversation you have just heard.
A. In a college bookstore.
B. In a lecture hall.
C. In a library.
D. In a dormitory.
Passage Two Questions 29 to 31 are based on the passage you have just heard.
A. Building ski jumps farther away from the city. B. Developing better public transportation in the city.
B. C. Planting more trees around the fields. D. Promoting the use of cleaner energy.
计算机主存储器的特点是存储容量有限，但存取速度快。( )
A. 对
B. 错
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