一般来说，在相同温度下，压力较大时，气体的粘度随压力增加而（）。
A、减小
B、增加
C、不变
D、升到一定值后不变
参考答案：B
一个长10m、宽6cm、高5cm的长方体，表面积是（ ） cm2，体积是（ ）cm3。
W: You’ve been doing weather reports for nearly 30 years. Has the weather got any worse in all these yearsM: Well, not necessarily worse. But we are seeing more swings.Q: Wha does the man say about the weather().
A. It’s worse than 30 years ago.
B. It remains almost the same as before.
C. There are more extremes in the weather.
D. There has been a significant rise in temperature.
