题干

若x+y+z=2,x2﹣(y+z)2=8时,x﹣y﹣z=____

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同类题2

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    Homestay provides English language students the opportunity to speak English outside the classroom and the experience of being part of a British home.

    What to Expect

    The host will provide accommodation and meals. Rooms will be cleaned and bedcovers changed at least once a week. You will be given the house key and the host is there to offer help and advice as well as to take an interest in your physical and mental health.

    Accommodation Zones

    Homestays are located in London mainly in Zones 2, 3 and 4 of the transport system. Most hosts do not live in the town center as much of central London is commercial and not residential. Zones 3 and 4 often offer larger accommodation in a less crowded area. It is very convenient to travel in London by underground.

Meal Plans Available

*Continental Breakfast

*Breakfast and Dinner

*Breakfast Packed Lunch and Dinner

    It's important to note that few English families still provide a traditional cooked breakfast. Your accommodation includes Continental Breakfast which normally consists of fruit juice, cereal, bread and tea or coffee. Cheese, fruit and cold meat are not normally part of a Continental Breakfast in England. Dinners usually consist of meat or fish with vegetables followed by dessert, fruit and coffee.

Friends

    If you wish to invite a friend over to visit, you must first ask your host's permission. You have no right to entertain friends in a family home as some families feel it is an invasion(侵犯) of their privacy.

    Self Catering Accommodation in Private Homes

    Accommodation on a room-only basis includes shared kitchen and bathroom facilities (设施) and often a main living room. This kind of accommodation offers an independent lifestyle and is more suitable for the long-stay student. However, it does not provide the same family atmosphere as an ordinary homestay and may not benefit those who need to practice English at home quite as much.

同类题5

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    An 80-year-old man was sitting on the sofa in his house along with his 45-year-old highly educated son. Suddenly a crow (乌鸦) landed on their window.

    The father asked his son, “What is this?”

    The son replied, “It is a crow.”

    After a few minutes, the father asked his son for the second time, “What is this?”

    The son said, “Father, I told you just now. It's a crow. ”

    After a little while, the father again asked his son the same question for the third time, “What is this?”

    This time, the son said to his father in a low and cold tone, “It's a crow, a crow.”

    After a moment, the father again asked his son for the fourth time, “What is this?”

    This time the son shouted at his father, “Why do you keep asking me the same question again and again? I have told you already, ‘IT IS A CROW'. Are you not able to understand this?”

    A minute later the father went to his room and came back with a diary, which he had kept since his son was born. On opening a page, he asked his son to read that page. The following words were written in it.

    Today my little son aged three was sitting with me on the sofa when a crow suddenly landed on the window edge. My son asked me 23 times what it was, and I replied him 23 times that it was a crow. I hugged him lovingly each time he asked me the same question. I didn't at all feet angry, but instead felt affection for my son.

    So...

    If your parents reach old age, do not look at them as a burden, but speak to them gently, and be kind to them. Be considerate to your parents.