每小时、每立方米催化剂通过标准立方米气体数是（）。 A.流速 B.停留时间 C.空速

中国古代无论是奴隶制还是封建制，都受到宗法制度和宗法精神的强烈影响。它不仅是宗族凝聚力的一种保障，而且是王权的重要支柱。君权、地方行 * * 都渗透了宗法父权的因素。这是封建专制制度得以长期牢固统治的条件之一。在国家的立法中，不仅确认了有关封建宗法制度的大量内容，而且承认宗法家规具有一定的法律效力，是国法的重要补充。这段话主要支持了这样一种论点，即( )

A．宗法制度强烈地影响着中国古代的政治、立法以及司法，甚至社会生活的各个方面

B．宗法制度成为中国古代专制统治的坚强基础

C．中国古代社会，宗法精神无处不在，渗透于整个社会生活

D．宗法制度被中国古代国家立法所确认，并成为国家立法的补充

齐桓公成为春秋时期霸主的原因主要有

①以“尊王攘夷”为口号

②注重发展经济

③任用贤臣，改革内政

④加强军队建设

⑤忍辱负重，卧薪尝胆

A．①②③④

B．②③④⑤

C．①③④⑤

D．①②④⑤

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.

低钾血症最早的表现是（）

A.口苦

B.恶心、呕吐

C.肌无力

D.肠麻痹

E.心电图出现T波降低、变宽、倒置等

女性，30岁，10年来，反酸、嗳气、上腹部饱胀，伴有规律性上腹痛，进食后加重。胃镜检查，胃窦小弯侧可见溃疡。不支持消化性溃疡诊断的胃镜所见是

A．溃疡直径小于2cm

B．溃疡边缘整齐

C．溃疡底部平坦

D．溃疡周围黏膜皱襞中断、结节状肥厚