一氧化碳浓度达到13%～75%时遇火爆炸,达到30%时,爆炸威力最强。

One day a dentist was starting his morning work. Suddenly a man ran in. His face was red and he could only say “Quick! Quick!”, The dentist thought he must be very ill. His assistant(助手) helped to make the poor man sit in a chair. The dentist gave the man some medicine to make him sleep. Then, he looked into the man’s mouth and pulled out all the bad teeth. As soon as the man woke up(醒来), he said in a low voice, “Quick, doctor, quick.”

“It’s all right now,” the dentist told him, “It’s over.”

“You don’t understand,” said the man, “I came to tell you your house is on fire.”

根据短文内容，选择正确答案。

小题1:The story happened        .

A．in the morning

B．in the afternoon

C．in the evening

D．at night小题2:When the man ran in, the dentist thought he must be         .

A．over

B．ill

C．all right

D．rich小题3:The man          after he took some medicine.

A．began to work

B．began to cry

C．went home

D．went to sleep小题4:The dentist pulled          out of the man’s mouth.

A．a tooth

B．a bad tooth

C．all the bad teeth

D．all the teeth小题5:The man ran in          .

A．bacause he was ill

B．because he wanted to sleep

C．to tell the dentist that he was all right

D．to tell the dentist that his house was on fire

人类对地球海陆分布的认识，经历了极其漫长的过程。早期，人们只能认识人类足迹和视野所及的地方，直到19世纪末和20世纪初，人类对地球表面的海陆分布才有一个基本正确的认识。下图为世界海陆分布图，读图回答1~3题。

1．上图中，按①②③的数字顺序，下列说法正确的是  [ ]

A．太平洋、大西洋、印度洋

B．太平洋、印度洋、大西洋

C．大西洋、太平洋、印度洋

D．印度洋、太平洋、大西洋

2．下列说法正确的是  [ ]

A．世界上跨经度最广的大洲是亚洲

B．大洋①将缩小，大洋②将扩大

C．地球表面以海洋为主，陆地主要集中在南半球

D．北美洲与南美洲的分界线是苏伊士运河  

3．全球六大板块中，几乎全部在大洋之中的板块是[ ]

A．美洲板块

B．亚欧板块

C．太平洋板块

D．非洲板块

人体气的运动称作( )

A．气机

B．气化

C．升降出入

D．气机调畅

E．阴阳转化

为了保证绝缘良好，接头的体积不作限制，即使过大的体积影响导线的排列也无所谓。（）

黄体酮试验，停药几天无 * * 出血提示有早孕可能

A．超过3d
B．超过4d
C．超过5d
D．超过6d
E．超过7d