植物细胞和动物细胞均有的结构是[ ]
A．细胞壁、细胞质
B．细胞膜、细胞核
C．大液泡、叶绿体
D．细胞膜、叶绿体
答案：B
She tried _____ Chinese in English class.[ ]
A. to not speak
B. not to speak
C. not speaking
D. didn't to speak
《悲惨世界》何时出版？
