下列方法可以用于种子活力测定的是()。
A.低温烘干法
B.电泳法
C.加速老化法
D.有限检验
参考答案:C
________about the result of the experiment,he still wants to give it a try.
A.Uncertain as he is
B.As uncertain he is
C.As he is uncertain
D.Uncertain is he as
天面管道须在建筑物避雷网保护范围内,且每隔()用Φ10圆钢与避雷网跨接一次。跨接连接处要用电焊()。
A、25m,双面满焊
B、50m,单面满焊
C、25m,双面点焊
D、50m,单面满焊