问题
单项选择题
某厂一台300MW机组，一直全出力运行状态。4月28日12：00因节日开始停运备用。当月机组可用小时是（）小时。
A、660
B、744
C、720
D、672
答案
参考答案：C
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某厂一台300MW机组，一直全出力运行状态。4月28日12：00因节日开始停运备用。当月机组可用小时是（）小时。
A、660
B、744
C、720
D、672
参考答案：C
| 完形填空。先通读短文，掌握其大意，然后从A、B、C、D四个选项中选出一个可以填入相应空白处的最佳答案，并将其标号填入题前括号内。 | ||||
| Now satellites are 1 to forecast (预报) the weather. They are in space, and they can 2 any part of the world. The satellites take pictures of the atmosphere (大气), 3 this is where the weather forms (形成). They send these 4 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 5 the weather will change. Today, nearly five hundred weather stations in sixty countries receive satellite pictures. When they receive new pictures, the meteorologists compare them with earlier 6 . Perhaps they may find that the clouds have changed during the last few hours. This may mean that the 7 on the ground may soon change, too. In their next weather forecast, the meteorologists can say this. So the weather satellites are a great 8 to the meteorologists. 9 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 10 forecast the weather for a week or more ahead (提前). | ||||
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