《供电服务规范》中规定，供电服务热线电话应当具备录音功能，电话录音至少应当保留（）

当毛细管的管径、管长及制冷剂在进口处的状态稳定时，制冷剂通过毛细管的流量，随蒸发压力的（）。

A.降低而增大

B.降低而减少

C.升高而减少

D.增大而增大

男，70岁，右侧牙龈红肿3个月余，近日自觉牙齿松动伴疼痛。检查：右侧下颌第二磨牙颊侧牙龈红肿，溃疡1cm大小，边缘不整如菜花状，质硬，牙齿Ⅱ度松动，右侧颌下淋巴结肿大。此患者应采取以下哪项措施最适宜（）。

A.抗生素治疗

B.转专科医院确诊

C.拔除松动牙

D.全身抗炎治疗与局部涂药

E.局部涂药

联合行文标注发文机关时，标在前面的机关是( )。

A．上级的

B．组织序列表中靠前的

C．主办的

D．其他系统的

How would you like to learn more without having to study more？Here’s how：

1．Get to bed and go to sleep.Your performance，attention，and the ability to concentrate are damaged by lack of sleep.Teenagers need nine to ten hours of sleep a night for best performance.

2．Feed your head.The brain runs badly if it doesn’t get enough fuel.That means protein(蛋白质)and complex carbs (复合碳水化合物)－eggs and wheat bread for breakfast，say，rather than sugary cereal(含糖的麦片粥)and orange juice.The biggest mistake teens make is not to have breakfast or to go for sugar，which raises blood sugar levels.

3．Body exercise is brain exercise.Body exercise really improves brain performance，perhaps because it increases blood flow，or perhaps because it reduces stress and anxiety(焦虑).Twenty minutes of activity a day that raises your heart rate will do great good.

4．Learn now what you want to remember for the rest of your life.Teenage brains are much better at remembering things than the brains  of young children or adults.Scientists aren’t sure why.Whatever the reason，the teenage years are the time to learn new languages and master other lifelong skills.

5．Learn the power of risk taking.Adults are always worried about the downside of teenage risktaking，and it’s true that teenagers are more likely than adults to get themselves in trouble by drinking and driving.But the fact that the parts of the brain that drive people to try new，risky，and exciting things appear to be more developed in teenagers can be a huge advantage.Pick certain challenges－difficult sports，a hard job，mastering a performance art，traveling overseas－and the teenage brain is able to deal with them.They have this power they’re given to go out and do it without fear.

6．Learn what you love.Because emotional(情感的)systems develop fast in teenager brains，teenagers learn things they’re interested in quickly and well.Their brains give them tools like attention on the project.

小题1:According to the passage，teenagers should have　　　　for breakfast.

A．wheat bread and eggs

B．sugar and orange juice

C．sugar and bread

D．wheat bread and orange juice小题2:Body exercise plays a part in all the following EXCEPT　　　　.

A．making people less anxious

B．raising heart rate

C．reducing blood pressure

D．reducing stress小题3:The underlined word “downside” in the passage probably means　　　　.

A．excitement

B．disadvantage

C．benefit

D．power小题4:It can be learned from the passage that　　　　.

A．teenagers learn quickly when they are fond of something

B．teenagers should be forbidden to drive

C．scientists know why teenagers have a good memory

D．teenagers need less sleep than adults

(3) 为明确诊断应首先选择的检查是( )

A．上消化道钡剂造影
B．腹部超声
C．立位腹部X线平片
D．卧位腹部X线平片
E．胃镜