The pupils in our school like reading after lunch, most of ________ seated on the grass unless it rains.
A：them
B：whom
C：that
D：who
新疆人民广播电台维吾尔语节目的发射频率是92.3MHz，它的波长是多少？
下列关于植物的向性说法错误的是 ( )
若4x2•□=8x3y，则“□”中应填入的代数式是____ ．
