热电阻的测温原理是金属的电阻值随（）的变化而变化。
A、密度
B、长度
C、温度
D、湿度
参考答案：C
—The T-shirt looks nice on you! How much does it ________?
—I just ________ ten dollars for it. [ ]
A. take; afforded
B. cost; paid
C. cost; spent
严重隐孢子虫病腹泻症状为
A．霍乱样水便B．脂肪吸收不良性水样便C．周期性稀便、恶臭D．“果酱样”血便E．脓样性血便
