问题:主茎的顶芽生长抑制侧芽生长的现象叫做顶端优势。()...
Sunday, January 22, 2023
Monday, September 12, 2022
Wednesday, September 14, 2022
Wednesday, September 14, 2022
问题:栽经济林培学主要是研究经济林栽培的()和()的科学。...
Tuesday, January 2, 2024
问题:按照根系的发生及来源可分为:(),()和()3类。...
Tuesday, October 3, 2023
Tuesday, January 2, 2024
问题:在取样调查时,通常用树冠外围新梢中部的叶片作为该树的代表性叶片。...
Thursday, June 29, 2023
Friday, May 26, 2023
Saturday, July 29, 2023
Thursday, June 29, 2023
Monday, August 14, 2023
Tuesday, January 2, 2024
Sunday, January 14, 2024
Sunday, November 19, 2023
Monday, March 13, 2023
问题:经济林栽培学的研究对象和目的是什么?有哪些特点?...
Wednesday, December 27, 2023
Wednesday, December 27, 2023
问题:下列属于淀粉类植物的是()。A、沙棘B、银杏C、椰子D、栓皮栎...
Friday, November 4, 2022
Thursday, January 19, 2023