搜题请搜索小程序“爱下问搜题”
问题
判断题
云梯消防车主要用于火灾扑救。（）
答案
参考答案：错
选择题
She understood what I was talking about, _____ it was the first time we had spoken together.
A. whether
B. even though
C. as though
D. since
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判断题
珠光体耐热钢的热影响区既具有淬硬倾向，又有冷裂倾向，同时钢中还存在再热裂纹的问题。( )
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