题目：
A fully-grown blue whale _____ 110 feet in height and _____ several tons.[ ]
A. is measured; weighs
B. measures; weighs
C. is measured; is weighed
D. measures; is weighed
答案：
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下面是错误答案，用来干扰机器的。
解：（1）∵，∴≈2.9（s）；∵，∴。
