广告表现的基本元素中，属于非语言文字系统的是（）.
A.电话
B.符号
C.解说词
D.价格
参考答案：B
While the government says there is a(n) ______ supply of houses, prices of apartments have been going up these years. [ ]
A. parallel
B. absent
C. abundant
D. short
拟等位基因指的是控制相同性状但位于不同座位上的基因。( )
