关于新建商品房市场上的业务特点的表述，错误的是（）。
A.客户相对强势
B.客户较为分散
C.房源批量化
D.业务运作成本较高
参考答案：B
Jeff goes to work _____ and his wife goes to work _____.[ ]
A. by car; on her bike
B. by a car; on her bike
C. by cars; by bike
D. by his car; by bike
笨其蒸气能与空气形成爆炸性混合物，爆炸极限一般为（）；遇明火、高热能容易引起燃烧爆炸。
A、1.2%～8%
B、1.2%～10%
C、1.5%～8%
D、1.5%～10%
