A．energy B．engineer C．encourage D．entrance

A.chief engineer

B.engineer

C.captain

D.any member of the engine department

A.chief engineer

B.engineer

C.captain

D.any member of the engine department

A．energy

B．spin of the electrons

C．probability of the shell

D．size of the orbital

E．axis along which the orbital is aligned

What can be inferred from the second sentence of the last paragraph？

A．Energy parks will be built upon previously undeveloped sites.

B．Energy parks will be built in areas remote from major population centers.

C．Energy parks can be built in a concentrated place to serve a big city.

D．Energy parks will be built at sites that are near fuel sources such as coal.

During the hours when you labor through your work you may say that you are “hot”.That's true.The time of day when you feel most energetic is when your cycle of body temperature is at this peak.For some people the peak comes during the morning.For others it comes in the afternoon or evening.No one has discovered why this is so, but it leads to such familiar words as: “Get up, John! You'll be late for work again!” The possible explanation to the trouble is he is at his temperature-and-energy peak in the evening.Much family quarrelling ends when husbands and wives realize what these energy cycles mean, and which cycle each member of the family has.

You can't change your energy cycle, but you can learn to make your life fit it better.Habit can help, Dr.Kleitman believes.Maybe you're sleepy in the evening but feel you must stay up late anyway.Counteract your cycle to some extent by habitually staying up later than you want to.If your energy is low in the morning but you have an important job to do early in the day, rise before your usual hour.This won't change your cycle, but you'll get up steam and work better at your low point.

Get off to a slow start, which saves your energy.Get up with a leisurely yawn and stretch.Sit on the edge of the bed a minute before putting your feet on the floor.Avoid the troublesome search for clean clothes by laying them out the night before.Whenever possible, do routine work in the afternoon and save tasks requiring more energy for your sharper hours.

1.Dr.Kleitman thinks that （）.

A.getting up late in the morning means laziness

B.if your energy peak is in the evening, you might like getting up early

C.people can do nothing about energy cycle

D.spending some time yawning and stretching helps to keep you energetic

2.According to the passage, family quarrels may result from （）.

A.the same energy cycle of family members

B.unawareness of different energy cycles

C.failing to get up early in the morning

D.knowledge of energy cycles

3.If you are used to getting up late in the morning, you are likely to be most energetic （）.

A.in the morning B.at noon C.in the afternoonD.in the evening

4.What's the likely relationship between energy cycle and body temperature？

A.Energy cycle and body temperature are the same things.

B.The higher your temperature is, the less energetic you are.

C.The higher your temperature is, the more energetic you are.

D.There is no direct relation between them.

5.Which of the following statements is not true？

A.One can change his energy cycle once he makes up his mind.

B.We still don't know why people have different energy cycles.

C.Habit will help to make our life fit energy cycles better.

D.If you rise earlier than usual, you will be more efficient at your low point in the morning.