一维晶格，周期势为 其中δ（x-na)为δ函数．孤立原子中s态电子的波函数 求晶格中s态电子的能带．

A．肌肉

B．骨骼

C．神经

D．组织

What should you do if you have got some polish on the skin around your fingernail？

A．Watch your brush.

B．Clean up as you go.

C．Apply in minimal sweeps.

D．Start with clean nails.

If you have active thoughts，your audience will detect that__________．

A.you are full of fear and depression

B.you are joyful and easy-going

C.you are tightening your vital triangle

D.you are relaxing your muscles

Section B

Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D.

听力原文： Many people hurt their backs when they try to lift heavy things from the floor. It is easy to hurt your back muscles because if you bend over, the muscles in your lower back can be hurt easily. However, there is a correct way to lift things from the floor. First bend your knees and squat down. Keep your back straight. Don't bend over from your waist; keep your back and hips and waist in a line. If you keep your back and hips straight the muscles are stronger, because they have much more support. The other muscles can then help the lower back muscles.

As you get down, try to get as close to the object as possible. For example, if you are to pick up a heavy box, get down directly in front of it.

Maybe you will have to spread your knees and legs. Put one knee on each side of the box. Remember at all times to keep your back straight. Put your hands under the object that is in front of you, between your knees. To lift the object, you should stand up slowly. Use your leg muscles in order to stand up. In other words, lift with your legs, not with your back.

(27)

A．Because they bent over from the waist.

B．Because they bent their knees and squat down.

C．Because they keep their back and hips in a straight line.

D．Because they used the muscles in the lower back.

A、A. Tighten your pelvic floor muscles B. Have a full bladder before exercise C. Make sure your tummy muscles are relaxed D. Make sure your inner thigh muscles are relaxed E. Repeat Kegel exercises 150-200 times or 25-30 minutes, 3 times a day

B、A. Tighten your pelvic floor muscles B. Have a full bladder before exercise C. Make sure your tummy muscles are relaxed D. Make sure your inner thigh muscles are relaxed E. Repeat Kegel exercises 150-200 times or 25-30 minutes, 3 times a day

C、A. Tighten your pelvic floor muscles B. Have a full bladder before exercise C. Make sure your tummy muscles are relaxed D. Make sure your inner thigh muscles are relaxed E. Repeat Kegel exercises 150-200 times or 25-30 minutes, 3 times a day

D、A. Tighten your pelvic floor muscles B. Have a full bladder before exercise C. Make sure your tummy muscles are relaxed D. Make sure your inner thigh muscles are relaxed E. Repeat Kegel exercises 150-200 times or 25-30 minutes, 3 times a day

E、A. Tighten your pelvic floor muscles B. Have a full bladder before exercise C. Make sure your tummy muscles are relaxed D. Make sure your inner thigh muscles are relaxed E. Repeat Kegel exercises 150-200 times or 25-30 minutes, 3 times a day

A、draw out

B、attend to

C、dwell on

D、hang around

You can ______ your muscles more powerfully by linking up your breathing to the exercise.

A．condense

B．compress

C．contract

D．shrink

Your muscles are working to move a weight when you are ______.

A．swimming

B．running

C．weightlifting

D．high jumping

Such being the case, we have to ask you to consider if you can make reduction in your price,(8)10%． As our order would be worth around Stg． 50000, you may think it worthwhile to make a concession．