【判断题】从养分供给角度看。玉米三叶期以前靠种子胚乳的养分来建造营养体。()
【单选题】[16-652]一般情况下,划分计算机四个发展阶段的主要依据是:
【单选题】Please choose the better one: (according to the principle of Courtesy)
A.
You are requested to send me a pricelist for your M-series.
B.
Would you please send me a pricelist for your M-series.