用于筛分析的砂子试样，其颗粒的公称粒径不应大于( )。
A．7.5mm
B．8.0mm
C．8.5mm
D．9.5mm
参考答案：D
How do we say the number 110,206?
A．one hundred, ten thousand, two hundred and six.
B．one hundred and ten thousands and two hundreds and six.
C．one hundred and ten thousand and two hundred and six.
D．one hundred and ten thousand, two hundred and six.
男，30岁，脐周疼痛5小时，伴恶心，无呕吐和腹泻，查血WBC12×109/L，血清淀粉酶不高。拟诊断为急性阑尾炎。
下列哪项体征对诊断最有意义
A．体温38.5℃
B．脐周压痛
C．右下腹压痛
D．肠鸣音减弱
