收益性物业的运营费用是除( )外物业发生的所有费用。 A．人员工资 B．抵押贷款

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     Now satellites are helping to forecast (预报) the weather. They are in space, and they can reach any

part of the world. The satellites take pictures of the atmosphere (大气), because this is where the weather

forms (形成). They send these pictures to the weather stations. So meteorologists (气象学家) can see the

weather of any part of the world. From the pictures, the scientists can often say how the weather will change.

     Today, nearly five hundred weather stations in sixty countries receive satellite pictures. When they receive

new pictures, the meteorologists compare (比较) them with earlier ones. Perhaps they may find that the clouds

have changed during the last few hours. This may mean that the weather on the ground may soon change, too.

In their next weather forecast, the meteorologists can say this.

     So the weather satellites are a great help to the meteorologists. Before satellites were invented, the scientists

could forecast the weather for about 24 or 48 hours. Now they can make good forecasts for three or five days.

Soon, perhaps, they may be able to forecast the weather for a week or more ahead (提前).

1. Why do we use the weather satellites to take pictures of the atmosphere? Because _______.

A. the weather satellites can do it easily

B. clouds form there

C. the weather forms there

D. the pictures can forecast the weather

2. Meteorologists forecast the weather _______.

A. when they have received satellite pictures

B. after they have compared new satellite pictures with earlier ones

C. before they received satellite pictures

D. during they study satellite pictures

3. Maybe we'll soon be able to forecast the weather for _______.

A. one day

B. two days

C. five days

D. seven days or even longer

4. The main idea of this passage is that satellites are now used in _______.

A. taking pictures of the atmosphere

B. receiving pictures of the atmosphere

C. doing other work in many ways

D. weather forecasting

根据某砖混结构工程中的典型设计图纸的结果，已知其毛石带型基础的工程量为 110m³，该砖混结构建筑物的体积为900m³，已知每10m³毛石基础需要用砌石工6.54工日，并且在该工程中没有其他工程需要砌石工，则在概算指标中砌石工为( )工日。

A．6.54

B．71.94

C．79.93

D．588.6

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