单项选择题

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

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单项选择题

Ireland is unique among European countries for（）.

A.its small population
B.its beautiful scenery
C.its rich natural resources
D.its century-long population decline

单项选择题

Ireland has the following demographic features except（）.

A.it has a low birthrate
B.it has a late marriage age
C.it has an excess of females in the population
D.it has a high proportion of bachelors and spinsters of all ages