A:(6,3)
B:(3,-6)
C:(-6,-3)
D:(-6,3)
What would ____(your/you)like?
________ useful information they've found on ________ Internet!
The meeting ____ (hold) this afternoon.
某同学测定溶液的pH时,用蒸馏水洗涤玻璃棒后,立即蘸取试样点在干燥的pH试纸中部,观察颜色并与标准比色卡对比进行检测.