在一般情况下,碳素钢中碳的质量分数越大,则钢的硬度越()
A.低
B.高
C.中等
参考答案:B
用伏安法测电阻,有如下两种电路连接方式,若采用(a)方式,则测量值______真实值(填大于、等于、小于),若采用(b)方式,则测量值______真实值(填大于、等于、小于).
It was announced that only when the terrible disease was under control _______ to return to their homes.
A.the residents would decide
B.would the residents decide
C.would the residents be decided
D.the residents would be decided