What are the reasons caused the tragedy of Hamlet? Which one is not the reason?
A. overconfident, not rely on the power of people
B. idealistic, accept the idea of Humanism
C. social situation:feudalism and tense confrontations
D. love to Ophelia
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What are Hamlet‘s character s?
A. Melancholy
B. Hesitate
C. Thoughtful
D. Responsible
种子粒径在2.0-5.0mm之间,属
A. 大粒种子
B. 中粒种子
C. 小粒种子
D. 微粒种子
中寿种子寿命在
A. 1-2年
B. 3年以内
C. 3-15年
D. 15年以上
粗肋草繁殖方法主要有哪些?
A. 扦插
B. 分株
C. 组培
D. 播种