1970年以来，城市经济结构重组以后，表现出来的重要演化趋势为：
A. 第三产业的比重上升，第二产业的比重下降
B. 综合化替代专业化
C. 第二产业的比重上升，第一产业的比重下降
D. 信息经济替代工业经济
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铅及其化合物主要以下列哪种形式进入人体( )
A. 烟
B. 蒸汽
C. 雾
D. 粉尘、烟或蒸汽
E. 以上都错误
在城市规划的前期为什么要进行城市用地的建设条件评价
A. 确定城市发展的布局
B. 确定城市发展规模
C. 确定对城市现有的各项物质要素利用改造的可能性和程度
D. 确定进行各项工程建设的可能性
In 1861, it seemed odd that the Southern states would break away from the Union.
A. strange
B. certain
C. inconsistent
D. proper
We can conclude from the passage that______.
A. performance is a better judge of ability than is a college degree
B. a college degree is more essential than experience in job applications
C. a degree from a leading school gives applicants an advantage in job competition
D. past work histories influence personnel officers as much as degrees do
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