中药材质量验收常用的经验鉴别技术是（）
A、火试法
B、水试法
C、两者都是
D、两者都不是
参考答案：C
—________ on weekends?
—She is going to wash her clothes. [ ]
A. When is she going to wash her clothes
B. What's she going to do
C. Where is she going to do
D. What are you going to do
采用公制水尺时，用阿拉伯数字标绘，水尺以数字下缘为准，两数字下缘间距为（）。
A.10cm
B.20cm
C.30cm
