The population in the 21st century according to the writer ______.
A. will be smaller than a fw years ago
B. will not be as small as people expect
C. will prove to be a threat to the world
D. will not consitute as serious a problem as expected
进口业务中，基本上采用信用证结算方式的阶段是( )。
A. 签订进口合同
B. 进口开证
C. 租船订舱
D. 办理进口保险
It can be inferred from the passage that ______.
A. slavery in the South was an evidence of American's racism
B. Indians were driven out of their homes into the west
C. Americans were threatened by wars during 1840s
D. Americans won their independence through westward expansion
“噫”是指
A. 暖气
B. 太息
C. 呕吐
D. 喷嚏
E. 呃逆
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