The author of this passage mentions "a road" in his introduction of the IP phones（）
A. to make it easier for the reader to understand the new technology
B. to imply that the phone calls are usually made on the road
C. because people usually would share a road with each other
D. because the road you are walking on is usually empty
Which of the following phrases in the fifth paragraph indicates the fridge's negative effect on the environment
A. "Hum away continuously".
B. "Climatically almost unnecessary".
C. "Artificially - cooled space".
D. "With mild temperatures".
The first volume was published（）
A. ten years ago
B. last year
C. five years ago
D. twenty years ago
应当交付1000公斤苹果，一次不能凑齐，而只能交付950公斤，此时债权人并不因此而遭受损失的，则其拒绝受领有悖于( )
A. 合同自由原则
B. 诚实信用原则
C. 合法原则
D. 公平原则
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