必须有主送机关的是______。A．上行文 B．下行文 C．平行文 D．领导人交办的

根据汉语提示填写字母。

1. s__xt__ __n (十六)

2. s__ __ __nt__ __n (十七)

3. __ __ght__ __n (十八)

4. n__n__t__ __n (十九)

5. tw__nt__ (二十)

以下不属于合同法的基本原则是( )。

A．诚实信用原则

B．不得损害社会公共利益原则

C．强制性原则

D．自愿原则

阅读理解。

     It's happened to all of us: we sleeplessly toss (翻转) and turn while the person next door snores (打呼噜)

his way through the night.

     "Millions of people snore, most of whom are men over the age of 20," said Robert Bone, chief of Head and

Neck Surgery at Scripps Clinic in San Diego."As many as 45 percent of people snore, and as many as 25

percent are chronic (慢性的) snorers. Male snorers far outnumber women who snore."

     To help chronic snorers get a good night's sleep, Dr. Bone treats his patients with Somnoplasty, a

now-proven procedure that he created at Scripps Clinic six years ago. "If you snore loudly and frequently and

do not have other breathing disorders, Somnoplasty may be the solution for you," he said.

     Somnoplasty uses low-temperature radio waves to treat a well-defined area in the soft palate (鄂). A small

prong is inserted into the mouth toward the back of the throat. Then radiofrequency energy is delivered beneath

the surface of the soft palate. The treated part is heated just enough to create an area of coagulation(凝结物).

Over the next four to six weeks, the body naturally tears off the treated part, reducing volume and solidifying

the area that is responsible for snoring.

     The procedure takes place in the doctor's office, and typically lasts no longer than 15 to 20 minutes.

Patients need two to four treatments, and the procedure is 80 percent effective. Treatment costs only $200 to

$300 and is covered by some insurance. Dr. Bone treats about 800 patients a year.

     "Somnoplasty is the state-of-the-art procedure for snoring," Dr. Bone said. "It can provide much-needed

relief to chronic snorers and their families."

     For more information or to schedule an appointment, call (858) 554-8964.

1. Which of the following is true about the snorers according to Robert Bone?

 A. 45% of the snorers are men who are over the age of 20.

B. Most people in the word are chronic snorers.

C. People who toss and turn sleeplessly will never snore.

D. There are far more male snorers than female snorers.

2. We can learn from the passage that _____.

A. the procedure of Somnoplasty takes place easily and doesn't take much time

B. the procedure of Somnoplasty is totally safe

C. almost every snorer can be cured with Somnoplasty

D. Dr. Bone may be very rich

3. The fifth paragraph aims to tell us _____.

A. the causes of snoring

B. the suffering of the treatment

C. the complexity of the treatment

D. the procedure of Somnoplasty

4. From what Dr. Bone said at the end of the passage we can learn that ______.

A. he is introducing this procedure to some experts

B. he is quite satisfied with the treatment of Somnoplasty

C. he is good at making ad.

D. Somnoplasty is the best way to treat snoring

5. Where can we possibly find the passage?

A. In a science magazine.

B. In a medicine advertisement.

C. In a health magazine.

D. From a TV talk show.

党的领导主要是指政治、思想和（）的领导。

有关肝炎病毒血清学标志物的意义，下列哪项是正确的（）

A.抗HBC-IgM可长期限存在

B.抗HAV-IgM阳性可诊断为急性甲型肝炎

C.HBsAg阳性说明病人有传染性

D.抗HCV阳性为既往感染

E.抗HBe是保护性抗体