当压缩机出口压力低于管网压力时，避免喘振的措施是（）。 A.开大反飞动阀 B.关小出

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

There is an English saying:“____1____.” Until recently, few people took the saying seriously. Now, however, doctors have begun to look into laughter and the effects it has on the human body. ___2_____.

Tests were carried out to study the effects of laughter on the body. People watched funny films while doctors checked their hearts, blood pressure, breathing and muscles. It was found that laughter has similar effects to physical exercise. ___3_____. If laughter exercises the body, it must be beneficial.

Other tests have shown that laughter appears to be able to reduce the effect of pain on the body. In one experiment doctors produced pain in groups of students who listened to different radio programs. The group that tolerated(忍耐) the pain for the longest time was the group which listened to a funny program. ___4_____

____5____. They have found that even if their patients do not really feel like laughing, making them smile is enough to produce beneficial effects similar to those caused by laughter.

A．Laughter can prolong one’s life.

B．As a result of these discoveries, some doctors in the United States now hold laughter clinics in which they help to improve their patients’ condition by encouraging them to laugh.

C．The reason why laughter can reduce pain seems to be that it helps to produce a kind of chemicals in the brain which diminish both stress and pain.

D．It increases blood pressure, the heart beating and breathing; it also works several groups of muscles in the face, the stomach and even the feet.E. Although laughter helps cure the disease, doctors still can not put this theory into clinic practice.

F. Laughter is the best medicine.

G. They have found that laughter really can improve people’s health.

2004年8月8日，外国公民某甲在甲国购买了两万元假美钞之后，欲携带这些假美钞入境在我国贩卖。2004年9月1日在办理入境手续时引起边检人员的怀疑。在边检人员对其盘问时，某甲交待携带假币入境的事实。2005年6月6日，某市人民法院对某甲进行审判。请回答下列问题。

下列关于某甲的量刑情节的表述正确的是( )。

A．某甲不具备法定从轻、减轻处罚情节

B．某甲能够如实交待自己的罪行具有法定从轻处罚情节

C．某甲具有自首情节可以从轻或者减轻处罚

D．某甲具有自首情节应当从轻或者减轻处罚

代谢性酸中毒的主要原因是

A．碳酸氢盐和二氧化碳无变化

B．二氧化碳过少

C．碳酸氢盐过少

D．碳酸氢盐过多

E．二氧化碳过多

(假设信息)患者年少，肾气不足加选

A．人参、何首乌、覆盆子

B．山药、紫河车

C．人参、仙茅、仙灵脾

D．紫河车、仙茅、仙灵脾

E．人参、覆盆子

随着时代的进步，新型的、民主的家庭气氛和父母子女关系还在形成，但随孩子的自我意识逐渐增强，很多孩子对父母的教诲听不进或当作“耳边风”，家长感到家庭教育力不从心。教师应该（）。

A.放弃对家长配合自己工作的期望

B.督促家长，让家长成为自己的“助教”

C.尊重家长，树立家长的威信，从而一起做好教育工作

D.在孩子面前嘲笑这些家长