The population of the world is growing at a dangerous______.A、stepB、rateC、meas

游客2024-01-17 54

问题 The population of the world is growing at a dangerous______.

选项 A、step
B、rate
C、measure
D、progress

答案 B

解析本题考查固定短语。at a…rate意为“以…速度”，符合语意。故选B。

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