化脓菌栓塞引起的梗死，其病变特点是
A．梗死灶呈灰白色，贫血B．梗死灶色红、严重出血C．梗死灶发生液化D．梗死区化脓E．梗死灶呈节段状
参考答案：D
—Excuse me，Miss Smith. Could you tell me how to improve my spoken English?
—OK. The best way is to practice *
A．as soon as possible
B．as quickly as possible
C．as much as possible
D．as clear as possible
和平共处五项原则是什么时候由谁提出来的？
