书法是用毛笔书写汉字的艺术。种类分为()、()、()、草、行五种。
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砌筑砂浆不吸水基层与吸水基层材料时,砂浆的强度分别与哪些因素有关?
A person who sees someone fall overboard should().
A. immediately jump into the water to assist the individual
B. call for help and keep the individual in sight
C. run to the radio room to send an emergency message
D. go to the bridge for the distress flare
急性早幼粒细胞白血病诱导缓解治疗首选()
A. 全反式维甲酸
B. VP方案
CHOP方案
D. HA方案
E. DA方案