计算：tan46°=（ ）。（精确到0.01）

鱼鳃是由______、______和_________组成，鳃片上长着许多细长的________，鳃丝内有_________。

阅读理解

     The gray-haired lady can't wait to leave the building to search for her dad. Unless watched, she will

walk in the streets in an effort to find her father, who died 30 years ago.

     Not all cases of Alzheimer's disease look like this, but Alzheimer's is a serious disease that is said to

be the fourth or fifth leading cause of death for people over age 75.

     It is said that about three percent of the U.S. population over age 65 have Alzheimer's. In the early

stages, people may exhibit short term memory loss. Some may experience changes in personality, easy

to be angry. As the disease progresses, patients might lose the ability to move and may be unable to

speak or move at all. This progressive disease generally lasts 8 to 10 years before death occurs.

      While no one is certain what causes these changes in the brain's nerve fibers (神经纤维), their effect

is certain. Alzheimer's destroys not only the patients, but also spouses (配偶), friends and families.

     What should you do if you notice progressive memory loss in yourself or a loved one? Have the

person examined by a doctor who is a specialist in the treatment of Alzheimer's disease. Though many

reasons other than Alzheimer's disease may cause memory loss, its early diagnosis (诊断) and treatment

may delay some of the most serious effects.

     What feeling will you likely experience should a loved one suffer from Alzheimer's disease? A person

will often go through the various stages of sadness, shock, anger, and so on. If the spouse develops the

disease, you may experience hurt and disappointment when he or she doesn't remember you are married.

     Life for the Alzheimer's patients and their loved ones will never be the same as the disease progresses, bringing a deep sorrow, loss and even anger towards God. No matter what feelings are present, facing

them honestly will serve one better than burying them.

1. What can be inferred from the passage about the gray-haired lady?

A. She has been living with her father.

B. She was sad about the death of her father.

C. She can't search for her father without being watched.

D. She suffers from Alzheimer's disease.

2. When people suffer from Alzheimer's disease, ________ .

A. their families and friends will suffer from the same disease

B. their families and friends will experience mental sufferings

C. they will certainly die in 8 to 10 years

D. they will forget everybody but their spouses

3. Memory loss occurs ________.

A. from Alzheimer's disease and nothing else

B. from sadness, shock, anger, and so on

C. for a number of reasons

D. with changes in personality

4. From the passage we know that ______ .

A. early treatment may stop Alzheimer's disease occurring

B. it is still unknown what causes the changes in the brain's nerve fibers

C. nerve fibers in the brain will cause Alzheimer's disease

D. when one suffers from Alzheimer's disease, he will be buried'

《木兰诗》中木兰不当官是不慕功名富贵吗？

_____________________________________________

急性心肌梗死合并三度房室传导阻滞最好采用（）

A.麻黄碱

B.阿托品

C.异丙基肾上腺素

D.糖皮质激素

E.临时心脏起搏器

各工作队流水节拍不等，但都是某一常数的倍数，这种流水方式称为( )。

A．全等节拍流水

B．固定节拍流水

C．成倍节拍流水

D．分别流水