A：∀x∈R,2x−1>0
B：∀x∈N*,(x−1)2>0
C：∃x∈R,lgx<1
D：∃x∈R,tanx=2
明皇李隆基“以姚崇、宋璟为相，廓清武后则天以来之积弊，励精图治。至民夜不闭户，道不拾遗,遂达臻全盛。”这里的“明皇”所创造的治世是指（ ）
下列关于遗传和变异叙述，错误的是（ ）
读句子，选答语。
A. She is my sister.
B. They are in the kitchen.
C. No, they aren't.
D. He's a student.
E. No, she isn't.
执手相看泪眼，____。柳永《雨霖铃》
