嘧啶醇（A-Rest）适用范围也很广，可用于各种穴盘苗。可采用根施或（）喷施。
参考答案：叶面
The new schoolbags and books _____by some warmhearted people arrived at the village school the day before yesterday.
A．to be donated
B．donating
C． being donated
D． donated
当预期收益率相同时，风险规避者会偏好于风险高的资产；当风险相同时，他们会钟情于具有高预期收益的资产。( )
