计算:a2•a3÷a4的结果是______.
a2•a3÷a4=a2+3-4=a,
故答案为:a.
China’s first lady ____________the home-made clothes to visit Russia in March,2013.
A.is wearing
B.wear
C.wore
D.will wear
短评的特点主要包括()
A.新鲜独到
B.以小见大
C.重在分析
D.生动灵活
E.短小精悍