物质生产实践是最基本的社会实践。
A. 对
B. 错
在这个上层建筑中，观念上层建筑居于主导地位，意识形态是核心。
A. 对
B. 错
_____ is the largest city and the chief port of the United States.
A. Washington C.
B. Los Angeles
C. San Francisco
D. New York City
The climate of the United States is influenced by ______.
A. the Atlantic and Pacific Oceans
B. the great lakes
C. the Gulf of Mexico
D. All of the above
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