题干

下列四个关系式:(1)y=x;(2)y=x2;(3)y=x3;(4)|y|=x,其中y不是x的函数的是(  )

A:(1)

B:(2)

C:(3)

D:(4)

上一题 下一题 0.0难度 选择题 更新时间:2019-04-15 06:37:51

答案(点此获取答案解析)

D

同类题1

任务型阅读

    Summer is the perfect time to gather with friends and share good food. You may want to set a pretty table and create a welcoming atmosphere, but without spending weeks preparing for the big night. Follow these steps for a stylish summer party.

    Choose a color plan

    The season itself can inspire the color plan, such as nature-inspired hues like ocean blues and grassy greens. One item may also inspire the rest of the party, such as these napkins____

    Use cotton for table cloth

    Instead of searching for just the right table cloth, head to your local cotton store where the options are endless____ No problem! Use pinking shears(花齿剪)to cut your table cloth and napkins to size.

    Bring the inside out

    Summer design tips often include the saying, “Bring the Outside In.” Well, for outdoor summer entertaining, bring the inside out! Get outside for your summer gathering____Create a welcoming environment by brining décor items inside your home out to your event.

    ____

    No summer party is complete without greenery. Choosing an all-green for your centerpieces provides the casual feel of summer. Grocery store Eucalyptus sprigs create the perfect summer centerpiece, but something form your yrd works just as well!

    Create simple and stylish place cards

    Place cards make you guests feel welcome, but you do not want to spend all day making complex name labels! Instead, choose a thick paper that fits your color plan. Cut a 4-inch square and fold it in half____ .

Now the table is set, the lounge is ready, and all that's left for you to do is enjoy your guests!

A. Does it look beautiful after designing

B. Use green plants instead of flowers

C. Don't have time or know how to sew

D. Write each person's name in gold paint pen

E. Go to a nearby store to buy some green plants

F. Once you make a decision, begin gathering your items

G. There is something magical about entertaining out in nature

同类题3

   Short and shy, Ben Saunders was the last kid in his class picked for any sports team. "Football, tennis Cricket — anything with a round ball, I was useless." he says now with a laugh. But back then he was the object of jokes in school gym classes in England’s rural Devonshire.
It was a mountain bike he received for his 15th birthday that changed him. At first the teen went biking alone in a nearby forest. Then he began to cycle along with a runner friend. Gradually, Saunders set his mind building up his body, increasing his speed, strength and endurance. At age 18, he ran his first marathon.
   The following year, he met John Ridgway, who became famous in the 1960s for rowing an open boat across the Atlantic Ocean. Saunders was hired as an instructor at Ridgway’s school of Adventure in Scotland, where he learned about the older man’s cold-water exploits (成就). Intrigued, Saunders read all he could about Arctic explorers and North Pole expeditions, then decided that this would be his future. Journeys to the Pole aren’t the usual holidays for British country boys, and many people dismissed his dream as fantasy. "John Ridgway was one of the few who didn’t say, ’You are completely crazy,’" Saunders says.
   In 2001, after becoming a skilled skier, Saunders started his first long-distance expedition toward the North Pole. He suffered frostbite, had a closer encounter (遭遇) with a polar bear and pushed his body to the limit.
   Saunders has since become the youngest person to ski alone to the North Pole, and he’s skied more of the Arctic by himself than any other Briton. His old playmates would not believe the transformation.
   This October, Saunders, 27, heads south to explore from the coast of Antarctica to the South Pole and back, an 1800-mile journey that has never been completed on skis.