证券X的期望收益率为12%，标准差为20%；证券Y期望收益率为15%，标准差为27%

任务型阅读（每空一词，每空1分，计10分）

It’s a good idea for families to talk about what they can do to escape(逃脱)from a fire(火灾) . Do you know what to do if there is a fire in your flat? Here are some tips for you:
1. Shout out. Shout as loudly as you can, because people may be asleep.
2. Call 119. Never try to put out a fire yourself. Tell 119 where you are and what is on fire.
3. Keep down close to the floor. There is less smoke down there, so it’s easier to breathe (呼吸) and see where you are going.
4. Test the door. If the door is cool, open it carefully. If not, do not open it! Try to find a different way out.
5. Get out. Do not stop to pick up anything. A fire can become very big in a few seconds!
6. Don’t use the lift（电梯）. Always use the stairs (楼梯) . The lift may go wrong. It isn’t safe and many keep you inside in a fire.
7. Don’t go back. Even if you leave your pet or favorite toy inside, do not go back for it. Animals have a very good sense of smell. They often get out of buildings before people.
  小题1:  to do in a fire

Shout 小题2: and then people can hear you.	It is dangerous to put out a fire 小题3: .
Keep down close to the floor because there is   小题4:   smoke there.	If the door is    小题5:  , we should find another way out
Do not stop to pick up  小题6: because a fire can become very big soon.	A lift is not  小题7:   in a fire because it can’t  小题8:  at that time.
Animals can get out because they have a good sense of   小题9:  .
Remember:  It’s important for everyone to be   小题10:  with fire.