如图是一个通电螺线管．在图上标出通电螺线管绕线上的电流方向及通电螺线管的N极．

枕先露时胎儿窘迫的诊断依据是

A．胎儿头皮血pH值为7.18
B．宫缩高峰时胎心110次/分
C．破膜后羊水Ⅰ度污染
D．胎心监护见到早期减速
E．胎动减弱

根据短文判断正（T）误（F）。

     Young people can have problems with their minds. Some students become worried because they

have to study very hard. Others have trouble getting on well with people like their parents and classmates.

      Jiu, a second year junior student from Fujian, could not understand his teacher and was doing badly

in class. He became so worried about it that he started to cut his fingers (手指)with a knife.

     Another student, 14-year-old Lan from Guangzhou, was afraid of exams. She got very worried, and

when she looked at the exam paper, she couldn't think of anything to write.

     A recent (最近的) report says about 18 percent of teens have mental (精神上) problems. Their

troubles include (包括) being worried and very unhappy, and having problems in learning and getting on

with people.

     Many students who have problems won't go for advice or help. Some think they will look stupid if

they go to see a doctor. Others don't want to talk about their secrets.

     An expert on teenagers has the following advice for teens:

     ●Talk to your parents or teachers often.

     ●Take part in group activities and play sports.

     ●Go to see a doctor if you feel unhappy or unwell.

( )1. Young people don't have problems with their minds.                    

( )2. It is important to get on well with others.                          

( )3. Lan was not worried about her exam.                                  

( )4. If we have some problems, we should use alcohol drinks to stop them.

( )5. Jiu could understand his teacher.                                    

一般将涵洞的基础埋在允许承压应力为( )kPa以上的天然地基上。

A．200

B．100

C．300

D．400

Most earthquakes occur within the upper 15 miles of the earth’s surface, but earthquakes can and do occur at all depths to about 460 miles. Their number decreases as the depth increases. At about 460 miles one earthquake occurs only every few years. Near the surface earthquakes may run as high as 100 in a month, but the yearly average does not vary much.

The extent of the disaster in an earthquake depends on many factors. If you carefully build a toy house with an erect set (坚立架), it will still stand no matter how much you shake the table. But if you build a toy house with a pack of cards, a slight shake of the table will make it fall. An earthquake in Agadir was not strong, but it completely destroyed the city. Many stronger earthquakes have done comparatively little damage. If a building is well constructed and built on solid ground, it will resist an earthquake. Most deaths in earthquakes have been due to faulty building construction or poor building sites. A third and very serious factor is panic. When people rush out into narrow streets, more deaths will result.

There is one type of earthquake disaster that little can be done about. This is the disaster caused by seismic (地震的) sea waves, or tsunamis (海啸). These are often called tidal waves, but the name is incorrect. They had nothing to do with tides. In certain areas, earthquakes take place beneath the sea. These submarine earthquakes sometimes give rise to seismic sea waves. The waves are not noticeable out at sea because of their long wave length. But when they roll into harbors, they pile up into walls of water 6 to 60 feet high. The Japanese call them “tsunamis” meaning “harbor waves”, because they reach a sizable (相当大的) height only in harbors.

Tsunamis travel fairly slowly, at speeds up to 500 miles an hour. An earthquake warning system is in use to warn all shores likely to be reached by the waves. But this only enables people to leave the threatened shores for higher ground: There is no way to stop the oncoming wave.

小题1:Which of the following can NOT be concluded from the passage?

A．The number of earthquakes is closely related to the depth.

B．Roughly the same number of earthquakes occur each year.

C．Earthquakes are impossible at depths over 460 miles.

D．Earthquakes are most likely to occur near the surface.小题2:The destruction of Agadir is an example of       .

A．faulty building construction

B．an earthquake’s strength

C．widespread panic in earthquakes

D．ineffective instruments小题3:According to the passage, the waves caused by submarine earthquakes are not noticeable out at sea because of       .

A．their high speed

B．the wide shores

C．their silent movements

D．their long wave length小题4:The significance of the slow speed of tsunamis is that people may      .

A．help reduce fear

B．find ways to stop them

C．be warned early enough

D．develop warning systems小题5:According to the passage, the number of factors that may determine the extent of the disaster in an earthquake is      .

A．two

B．five

C．four

D．three

“装卸损坏条款”经常出现在（）。

A．航次租船合同中

B．定期租船合同中

C．提单条款中

D．船舶保险合同中