题目

（08年宁波效实中学期中物理文）空调机、电冰箱和消毒柜都使用了A．温度传感器    B．红外线传感器    C．生物传感器    D．压力传感器 答案：AThe crossing was blocked by many trucks and buses,           made it impossible for us to go to work on time.A．whereB．whatC．whickD．that