按要求改写句子。

1. What's the time? (同义句)

__________________________________________

2. What's the weather like? (同义句)

__________________________________________

3. Is it rainy today? (肯定句)

__________________________________________

4. It's five thirty. (就划线部分提问)

__________________________________________

一般石油产品的安定性包括（）和（）。