—The milk looks _________. Drink some, my boy?
—No, thanks. I don't feel _________ today.
A:good, good
B:good; well
C:well; well
D:well; good
植物生长需要量最多的无机盐是( )
电源电压为3V,为了探究小灯泡在(0V~3V)不同电压下的电阻情况,某同学设计如图甲电路,当滑动变阻器滑片P从A端向B端滑动过程中,可探究小灯泡的灯丝电阻在不同电压条件下的阻值情况.
x
0
1
3
4
y
2.2
4.3
4.8
6.7
从散点图分析,y与x线性相关,且 y^ =0.95x+a,则a=____.
计算18÷34×43结果为( )