患者，男性，65岁，胸痛向左肩臂放射，伴出汗4h，含硝酸甘油不能缓解，心电图检查无典

甲与丙签订债权转让合同，将甲对乙的债权转让给丙。几天后，甲将此情形口头告诉了乙。后由于甲与丙产生了争议，甲便又通知乙，撤销先前的通知，而丙对此一无所知。下列选项正确的有( )。

A．甲以口头形式将债权转让通知给乙，不能发生效力

B．甲以口头形式将债权转让通知给乙，可以发生效力

C．甲撤销债权转让通知的行为不能发生效力

D．在甲撤销通知之后，乙仍然可以向丙履行债务

E．若乙对甲享有债权，且乙的债权先于甲的债权到期，乙可以向丙主张抵销

以下关于腺周口疮和结核性溃疡说法不正确的是

A．病因不同

B．均有自限性

C．腺周口疮可呈弹坑状

D．结核性溃疡呈潜掘状

E．结核性溃疡常伴有全身症状

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Research shows that childhood friendships are important indicators of future success and social adjustment. Children's relationships with peers (同龄人) strongly influence their success in school, and children with fewer friends are more likely dropping out of school, becoming sad and other problems.

Making and Keeping Friends Is More Than Child's Play

When 6-year-old Rachel returned to school on a recent Monday morning, her eyes immediately scanned the playground for her friend Abbie. Though they were only separated by a weekend, the girls "ran right into each other's arms and hugged," recalls Rachel's mother Kathryn Willis of Gilbert. "It was like a scene from a movie."

Most parents instinctively (本能地) know that having friends is good for their child. Experts agree that friendship is not simply child's play, but a powerful predictor of social adjustment throughout life.

A Skill for Life

"Childhood friendships serve as a very important training ground for adulthood," says Dr. Robbie Adler-Tapia, psychologist with the Center for Children's Health & Life Development.

Researcher William Hartup states, "Peer relations contribute significantly to both social and cognitive (认知的) development." Hartup concludes that the single best childhood predictor of adult social adaptation is not school grades or classroom behavior, but rather, how well a child gets along with other children.

The work of Arizona State University proves that just as being able to make and keep friends is beneficial to kids, so is the lack of friends detrimental.

Good Friendships Don't Just Happen

Experts agree that it is basic for children to develop high-quality friendships. But, researchers warn, these friendships don't necessarily just happen. Often, a good friendship begins with involved （卷入，牵连）parents.

Valley psychologist Dr. Lynne Kenney Markan believes kids should be taught social skills in much the same way they are taught math and reading.

Bad Company

Many parents worry about the quality as well as the quantity of their child's friendships. "When she was in 1st grade, her supposed 'best friend' began calling her names and threatening to hurt her," says Mindy Miller. "My daughter wasn't allowed to talk to or even look at other girls in her class. It really crushed (压跨) her spirit. I told my daughter she didn't need a 'friend' like that."

"I'll bend over backwards to help my son get together with a friend I think is good for him," Adler-Tapia says. "I don't look at it as manipulation (操纵), just positive parental involvement. "

小题1:The example of Rachel and Abbie is used to show that ________.

A．childhood friendship is of great benefit to their growth

B．a positive friendship helps children solve emotional and physical problems

C．it is a proven（被证明的） fact that peer friendship is the most rewarding experience throughout life

D．Rachel missed her friend Abbie very much because of their separation of one weekend小题2:The underlined word "detrimental" could be replaced by _______.

A．valuable

B．disappointing

C．accurate

D．harmful小题3:We can learn from the passage that high-quality friendship most probably results from ______.

A．social skills and good study habits

B．school grades and classroom behaviors

C．academic success and social adaptation

D．positive parental involvement and social skills小题4:From the last paragraph we can conclude that Dr. Robbie Adler-Tapia agrees that ______.

A．parents should regard making friends as something that just happens

B．it's wise for parents to support and encourage healthy peer relationships

C．parents only need to help their children to deal with difficult social situations

D．parents are supposed to encourage their children to make as many friends as they can