按成因湖泊主要有哪几种类型？

设，求dy.

下列生活实例中，与连通器无关的是（    ）

A．船闸

B．注射器

C．锅炉水位计

D．茶壶

患儿女，5个月，因“低热、呕吐、腹泻2d”来诊。患儿为人工喂养，末添加任何辅食。平时食欲差、易激惹。近2d低热、呕吐、腹泻，为黄色稀水粪，5～7次/d。查体：体重4.2kg，面色苍白，可见枕秃、颅骨软化（＋），前囟微凹，皮肤弹性差，肌肉明显松弛；心音低钝，肺呼吸音清，腹软，腹部皮下脂肪厚约0.2cm。

本患儿目前可能发生了（）。（提示该患儿凌晨大汗淋漓、面色苍白、脉慢、意识不清、呼吸暂停，肢凉。急查血常规：正常范围；血糖2.2mmol/L（40mg/dl）。）

A.心力衰竭

B.休克

C.低血糖症

D.低钙血症

E.呼吸衰竭

F.昏厥

G.虚脱

Parents often believe that they have a good relationship with their teenagers. But last summer, Joanna and Henry noticed a change in their older son: suddenly he seemed to be talking far more to his friends than to his parents. “The door to his room is always shut.” Joanna noted.

Tina and Mark noticed similar changes in their 14-year-old daughter. ”She used to cuddle up with me on the sofa and talk,” said Mark. “Now we joke that she does this only when she wants something. Sometimes she wants to be treated like a little girl and sometimes like a young lady. The problem is figuring out which time is which.”

Before age 11, children like to tell their parents what’s on their minds. “ In fact, parents are first on the list.” Said Michael Riera, author of Uncommon Sense for Parents with Teenagers. “This completely changes during the teen years.” Riera explained. “They talk to their friends first, then maybe their teachers, and their parents last.”

Parents who know what’s going on in their teenagers’ lives are in the best position to help them. To break down the wall of silence, parents should create chances to understand what their children want to say, and try to find ways to talk and write to them. And they must give their children a mental break, for children also need freedom, though young. Another thing parents should remember is that to be a friend, not a manager, with their children is a better way to know them.

65．“The door to his room is always shut” suggests that the son________.

A．is always busy with his studies                                                             

B．doesn’t want to be disturbed

C．keeps himself away from his parents       

D．begins to dislike his parents

66．What troubles Tina and Mark most is that_______

A．their daughter isn’t as lovely as before   

B．they can’t read their daughter’s mind exactly

C．they don’t know what to say to their daughter

D．their daughter talks with them only when she needs help

67．Which of the following best explains ”the wall of silence” in the last paragraph?

A．Teenagers talk a lot with their friends.

B．Teenagers do not want to understand their parents.

C．Teenagers do not talk much with their parents.

D．Teenagers talk little about their own lives.

68．What can be learned from the passage?

A．Parents are unhappy with their growing children.

B．Parents have suitable ways to talk with their teenagers.

C．Parents should be patient with their silent teenagers.

D．Parent should try to understand their teenagers.

与可摘局部义齿支托折断无关的是（）

A．支托制作工艺是否正确

B．支托凹间隙预备是否足够

C．支托设计是否合理

D．力的大小

E．牙列缺损类型