京剧中的念白讲究______分明______准确，从而增强念白的______和______。P70
参考答案：尖、团，四声，表现力、感染力
Many football fans attached great importance to the two matches, because China needed to beat Iran to ensure ________ for the Asian Cup semi-finals.
A．outcome
B．conservation
C．qualification
D．occupation
玉米体细胞染色体是10对，根尖生长点的一个细胞，经过连续两次分裂后每个子细胞中的染色体数是[ ]
A．5个
B．10个
C．20个
D．40个
