Which of the following four sentences is concise.
A. The reason why most of the country shifts to daylight savings time is that winter days are much shorter than summer days.
B. There were pine trees that stood like giants.
C. The intention of the company was to expant its workforce.
D. The company proposed to diversify the background and abilities of employees.
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Two of the following are complete sentences. please pick them up.
A. Dream of Red Mansion Is the best-known novels.
B. The greatest danger that a species faces in a rapidly coevolving ecosystem.
C. This problem can be effectively solved only in this way.
D. The encouragement from the tutor had a great effect on him that he worked harder.
Which of the following senences are grammtically correct? Please pick them up.
A. The young man walked quickly and with confidence up to the stage.
B. For most drivers who drink alcohol, the risk of causing an accident is doubled.
C. The interne has too much information mislead us.
D. Most drivers who drink alcohol double their risk of causing an accident.
数据结构是相互之间存在一种或多种特定关系的数据元素的集合，它包括三方面的内容，分别是数据的逻辑结构、（ ）和（）。
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