蚜传病毒病,采收前()天以株定病级并挂牌,分次采收,做全株损失估计并取样进行品质分析。
A、2~3天
B、2~4天
C、1~2天
D、1~3天
参考答案:C
病毒性心肌炎急性期应卧床休息的时间为()
A.1周
B.1~3周
C.3~6周
D.6~12周
E.6~12个月
Each fire hydrant serving machinery spaces containing oil fired boilers,internal combustion machinery,or oil fuel units must be equipped with a().
A.fireman's outfit
B.low-velocity spray applicator
C.marine strainer
D.pick axe