①画出反射光线及对应的入射光线；

②大致画出入射光线进入水的折射光线。

脱落酸能促进种子的休眠和果实的脱落，但在高温条件下会分解。小麦在即将成熟时，如果经历持续一段时间的干热后，遇大雨，种子就容易在穗上发芽。因为脱落酸（    ）

前列腺  ____    A、保护睾丸和附睾

阴囊    ____    B、排除精液和尿液

尿道    ____   C、产生精子分泌雄性激素

睾丸    ____   D、贮存和输送精子

附睾    ____   E、分泌黏液

    A little boy invited his mother to attend his school's first teacher-parent meeting. To the little boy's dismay(沮丧)， his mother said she would go. This would be the first time that his classmates and teachers met his mother and he was embarrassed by her appearance. There was a severe(严重的) scar (伤疤) that covered nearly the whole right side of her face. The boy never wanted to talk about why or how she got the scar.

    At the meeting， the people were impressed by the kindness of his mother with the scar， but the little boy was still embarrassed and hid himself from everyone. However， he could hear clearly the conversation between his mother and the teacher.

     “How did you get the scar on your face?” the teacher asked.

    The mother replied， “When my son was a baby， he was in a room that caught on fire. Everyone was too afraid to go in because the fire was out of control， but I went in. As I was running towards his bed， I saw a burning wood falling down and I placed myself over him trying to protect him. I was knocked to be unconscious(无知觉的)， but luckily， a fireman came in and saved both of us.” She touched the burned side of her face. “This scar will be forever， but until today， I have never regretted doing what I did.”

    When the little boy heard this， he couldn't help running towards his mother with tears in his eyes. He hugged her and felt his mother was greater than anyone. He held her hand tightly for the rest of the day.

    Best Way to Save Money

    Although the best way to save money can vary from person to person, depending on age, family size and other characteristics, there are still some easy things that all shoppers can do to keep more money in their bank accounts.

    Avoid impulse (冲动的) purchases.

    When you shop, a best way to save money is to have a plan in mind to help you avoid impulse purchases.  ____ And you only carry the exact amount of cash that you will need for your planned purchase. Some shoppers agree to discuss any purchases over a certain dollar amount with their spouses (配偶) first.

    ____

    Sometimes the best way to save money in the long term is to spend a little more money right now.  ____ A high-quality pair of shoes will last longer than a bargain pair and prevent foot pain. Leaner (瘦的) cuts of meat and organic produce provide health benefits for your family.

    Buy secondhand.

    Check classified ads, thrift stores and garage sales for used clothing, toys, furniture, and much more available at a part of their original cost.____ And there members offer unwanted items for free to anyone willing to pick them up.

    Borrow instead of buy.

    If you're only going to use something once, try to borrow it instead of spending your money on it. Borrow a tool from your neighbor.____ Check out the resources at your local library. You'll also be reducing disorder in your home.

A. Make things by yourself .

B. Exchange books with a friend.

C. Know when to pay for quality.

D. Refuse to buy things you can't use.

E. For instance, you might leave your credit cards at home.

F. A good piece of furniture can stay in the family for decades.

G. For the most secondhand savings, check out groups like Freecycle.