苔藓植物适于生活在阴湿环境中，下列叙述与此无关的是 [ ]
A．没有根
B．受精离不开水
C．有叶子
D．缺少输导组织
答案：C
Mr. Blake ____ Shanghai in a few days. Do you know when the earliest plane ____ on Sunday?
A．is leaving, takes off
B．leaves, takes off
C．is leaving, is taking off
D．leaves, is taking off
切牙嵴顶属于（）
A.主承托区
B.副承托区
C.缓冲区
D.后堤区
E.边缘封闭区
