下列叙述中正确的是( )。
A．线性表是线性结构 B．栈与队列是非线性结构C．线性链表是非线性结构 D．二叉树是线性结构
参考答案：A
LDL受体可识别血浆LDL颗粒中的()
A．ApoA
B．ApoB48
C．ApoB100
D．ApoC
E．ApoD
He says "hello" to his friends from ________ countries. [ ]
A. speak English
B. say English
C. English speak
D. English-speaking
