It’s commonly acknowledged that infant mortality has declined because of recent

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问题 It’s commonly acknowledged that infant mortality has declined because of recent medical _________and a higher standard of living.

选项 A、recoveries
B、discoveries
C、coverage
D、leverage

答案 B

解析 recovery意为“恢复，痊愈”；discovery意为“发现，发现的东西”；coverage意为“报道”；leverage意为“影响力，杠杆作用”。句意：人们公认近代的医学发现和生活水平的提高使婴儿的死亡率下降了。

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