为促进生长枝叶以获取木材,主要施用氮肥,但也施相应数量的磷肥或钾肥。
参考答案:对
Mum, _____ my good friends, Kate and Lucy. [ ]
A. she is
B. they are
C. this is
D. these are
治疗特发性血小板减少性紫癜慢性型首选方案为()
A.输新鲜血小板
B.X线脾区照射
C.使用止血药
D.使用糖皮质激素
E.脾切除