He reduced his needs to the ___ by simplifying his life.
A. minimize
B. minimum
C. maximize
D. maximum
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Vast sums are needed to maintain the ___ in this country.
A. facilities
B. equipment
C. infrastructure
D. amenity
He is interested in wildlife ___.
A. conservation
B. conversation
C. communicative
D. conservative
若有 a=3,则执行下列语句为a的值为? a+=a*=a;
A. 3
B. 12
C. 9
D. 8
人口工作和人口普查十分重要,今年是新中国诞生71周年,全国人口普查也是第_________次了。
A. 6
B. 7
C. 8
D. 9