植苗前修根主要是剪去（）。
A、全部根系
B、全部侧根
C、大部分主根
D、发育不正常的偏根和过长的主根和侧根
参考答案：D
Owing to the unrest in North Africa, the Chinese government is _____ efforts to withdraw its nationals from Libya and neighboring countries.
A opening up B stepping up C making up D taking up
“猿手”畸形见于哪种神经损伤
A．腋神经
B．肌皮神经
C．尺神经
D．桡神经
E．正中神经
