社会主义制度的建立是中国历史上最深刻的变革，这一变革完成的标志是 [ ]

A．解放战争的胜利

B．中华人民共和国的成立

C．《中华人民共和国宪法》的颁布

D．三大改造的基本完成

During the winter months，the southeast trade winds are（）.

A.per than during the summer months

B.weaker than during the summer months

C.drier than during the summer months

D.wetter than during the summer months