There were________fish in the river in South America.
A. in danger
B. danger
C. dangerous
D. dangerless
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The child looked at me________.A、 strangerB、C、D、
A. stranger
B. strangely
C. strange
D. strangeless
The black people were against slavery and fought for their________bravely.A、B、
A. free
B. freely
C. freedom
D. frees
电弧炉炼钢通常是指( )电弧炉炼钢。
A. 碱性
B. 酸性
电弧炉是采用( )作为热源进行炼钢的炉子
A. 风能
B. 电能
C. 燃料