试分析粘结漏钢的原因有哪些？

Bungee jumping is not a new activity. Men on Pentecost Island in the South Pacific have been doing land jumping for hundreds of years. The men tie long vines(藤) from plants around their ankles（踝关节）. They spend days building tall towers out of vines and logs(圆木). Then they jump off them.

According to their beliefs, the first land diver was a woman. She decided to run away from her rude husband. So she climbed up a tall tree and tied some vines around her feet. Her husband also climbed up the tree and tried to catch her, but the woman jumped and the man followed. The vines saved her life, but her husband died.

This ancient custom caught the interest of some students at Oxford University in England. In the late 1970s, they formed a group called the Dangerous Sports Club. They were some of the first people to test several of what are now called extreme sports. They are said to have invented modern bungee jumping.

In the spring of 1979, members of the group jumped off the Clifton Suspension Bridge in Bristol, England. They were attached to the bridge by a bungee cord, a long elastic rope that stretches. The group soon received even more attention when they organized a bungee jump off the Golden Gate Bridge in San Francisco, California.

A man named A. J. Hackett of New Zealand decided to make the sport into a business. He started developing bungee ropes and material with a friend. They held a major jump in 1987 off the famous Eiffel Tower in Paris, France. They later got permission to open the first bungee jumping operation on the Kawarau Bridge in Queenstown, New Zealand. Many people paid 75 dollars to jump off the bridge with a bungee cord attached to their ankles.

小题1:The second paragraph tries to tell us________________.

A．a story about a woman land diver

B．the beginning of modern bungee jumping

C．the beginning of land jumping on Pentecost Island

D．a story about a brave woman and her rude husband小题2:The underlined word them in the first paragraph refers to__________.

A．plants

B．tall towers

C．vines

D．logs小题3: The Dangerous Sports Club first caught people’s attention when they jumped off_________.

A．the Eiffel Tower

B．the Kawarau Bridge

C．the Golden Gate Bridge

D．the Clifton Suspension Bridge

肥胖病之胃热滞脾证的选方是（）

A.二陈汤

B.小承气汤

C.平胃散

D.保和丸

E.导痰汤

治疗风热郁闭，咽喉肿痛，大便秘结者，应选用的药物是（）

A.薄荷

B.蝉蜕

C.菊花

D.蔓荆子

E.牛蒡子

患者男，28岁。左颌下肿胀半年，有消长史。触及2cm×2cm大小囊性肿物，有波动感，用力时肿物突人口底，口底黏膜呈淡蓝色

为明确诊断，首先应做哪项检查

A．穿刺液检查

B．颌下腺造影

C．颌下腺侧位片

D．细胞学检查

E．CT

当汽缸温度下降至（）℃以下时，才允许揭大盖、

A、50

B、60

C、80