花果调控技术是园艺作物获得高产稳产优质的关键技术,主要包括:(),(),果实品质的调控技术和花性别调控技术等。
参考答案:花果数量调控技术;花期调控技术
0乘以任何数都得______,0除以______数都得0.
October 24, 1860, the Qing government and the Britain sighed "the treaty ofBeijing", ___ put an end to the second Opium war.
A.which
B.that
C.when
D.in which