小麦在越冬期施用的肥料称为()。
A.苗肥
B.分蘖肥
C.腊肥
D.返青肥
参考答案:C
试述沙门菌的抗原基本构造。
For ship-to-shore distress alerts, you can use().
A.INMARSAT, EPIRB and DSC
B.NAVTEX, NBDP and R/T
C.INMARSAT, VHF and SART
D.EPIRB, DSC and radar