减少表达之前的紧张情绪的有效方法有______。
A．充分准备 B．事前演练镜子功 C．自我暗示 D．以上3项
参考答案：D
There is much chance ______ Bill will recover from his injury in time for the race.[ ]
A. that
B. which
C. where
D. when
根吸水的部位主要是靠根尖的 [ ]
A．分生区
B．伸长区
C．根冠
D．成熟区
