题干
—How do you find your trip to the Great Wall?
—We had an awful time！________，George got sick the day we arrived，and then it rained the next day.
A：On the other hand
B：To begin with
C：As a consequence
D：On the contrary
答案(点此获取答案解析）
B
．恒容时，温度升高，H2浓度减小，下列说法正确的是（ ）