下列有关种子的叙述,错误的是( )
A.一般来说,种皮受损不影响种子萌发
B.绝大多数种子的萌发不需要光
C.种子萌发不需要空气
D.有些种子有休眠期
答案:C
Their products enjoy 30 percent_____ of the market in this country because both the quality and their service are fine.
A.share
B.profit
C.possession
D.advantage
A.流过R的电流将增大到原来的2倍
B.R两端的电压将减来原来的
C.R上消耗的功率将变为原来的
D.当R阻值变为零时,电压表示数将增大到3U