晨昏线指的是[ ]
A、表示早晨和黄昏的界线
B、表示昼夜长短的分界线
C、表示昼半球和夜半球的分界线
D、表示日出和日落的分界线
答案：C
These two areas are similar ________ they both have a high rainfall during this season.
A．to that
B．besides that
C．in that
D．except that
.当水中只有OH－存在时，可测得酚酞碱度，无需再用甲基橙作指示剂继续滴定。（）
