The population decreased from the 1840s until about 1970,largely because of（）.<br>A:a low birth rate<br>B:a high death rate<br>C:a low employment rate<br>D:a high emigration rate

The population decreased from the 1840s until about 1970,largely because of（）.
A:a low birth rate
B:a high death rate
C:a low employment rate
D:a high emigration rate

出自：00522《英语国家概况》

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