- 搜标题
- 搜题干
- 搜选项
单项选择题
______ giant steel cylinders were directly fixed on the seabed and inserted into the seabed, and then filled in the middle to form an artificial island.
______ giant steel cylinders were directly fixed on the seabed and inserted into the seabed, and then filled in the middle to form an artificial island.
A、100
B、120
C、50
D、200
