— Your tea, please. — There must be _____ in the tea. I like this kind of tea very much. A. nothing sweet B. something sweet C. sweet something D. sweet nothing 答案:B当你用拇指和食指快速夹住垂直落下的尺子时,尺子刻度值的大小可反应你的反应速度下图为测定反应速度开始和结束手的位置,请你准确读取尺子上能够反映反应速度的刻度值(单位cm)。( ) A.1 cm B.3 cm C.4 cm D.5 cm