在发达的商品经济中，支付手段发挥作用的主要场所是（）。
A.信贷收支
B.支付工资
C.财政收支
D.大额交易
参考答案：D
阅读理解。
What does the sign (标识) say?
1. What time does the university park open in March?
A. At 6: 00 am.
B. At 6: 30 am.
C. At 8:00 am.
D. At 8: 30 am.
2. Which sign tells you not to smoke?
A. Sign 2.
B. Sign 4.
C. Sign 6.
D. Sign 8.
3. Where can you see Sign 9?
A. On the playground.
B. At the school library.
C. Near the swimming pool.
D. In the computer room.
露点的定义是（）
A、过饱和空气变成饱和空气时所对应的温度
B、未饱和空气降温使其刚达到饱和时所对应的空气温度
C、饱和空气变成不饱和空气时所对应的温度
D、饱和空气变成过饱和空气时所对应的温度
