感温膨胀阀之感温球应安装于（）位置
A.室内最热处
B.蒸发器出口处
C.室内最冷处
D.以上皆非
参考答案：B
Sandy went to Tibet by train this summer for the first time. She had an unusual _________.
A．experience
B．experiment
C．knowledge
D．condition
水泥混凝土路面的材料强度指标是以28d龄期的( )强度试验结果为依据。
A．抗压
B．抗折
C．抗剪
D．抗拉
