中国大学MOOC: Infant mortality has been ______ reduced because of modern medicine.现代医学使得婴儿死亡率极大地降低了。
举一反三
- 婴儿死亡率（infant mortality）的定义是______。
- 婴儿死亡率（infant mortality）的定义是______。 A: 出生前即死亡 B: 出生后立刻死亡 C: 出生后1个月内死亡 D: 出生后1年内死亡
- Because air pollution has been greatly reduced, this city is still _______ .
- The doctors are at a loss because so far no medicine has been found to _____ the spread of the disease.
- 中国大学MOOC: 22. A modern city has been set up in ______ was a wasteland ten years ago.