左心衰竭患者呼吸困难的机制不包括（）。 A.肺淤血 B.肺泡张力增高 C.肺泡弹性减

人体感染猩红热后可获终生免疫，不会再次感染患病。

阅读理解。

     People in the United States honour their parents with two special days: Mother's Day, on the second

Sunday in May, and Father's Day, on the third Sunday in June. These days are set aside to show love and

respect for parents. They raise their children and educate them to be responsible citizens. They give love

and care to their children. These two days offer an opportunity to think about the changing roles of mothers

and fathers. More mothers now work outside the home. More fathers must help with childcare.

     These two special days are celebrated in many different ways. On Mother's Day people wear carnations

(康乃馨). A red one symbolizes (象征) a living mother. A white one shows that the mother is dead. Many

people attend religious services to honour their parents. It is also a day when people whose parents are dead

visit the cemetery. On these days families get together at home, as well as in restaurants. They often have

outdoor barbecues (烤肉) for Father's Day. These are days of fun and good feelings and memories.

     Another tradition is to give cards and gifts. Children make them in school. Many people make their own

presents. These are valued more than the ones bought in stores. It is not the value of the gift that is important,

but it is "the thought that counts". Greeting card stores, florists, candy makers, bakeries, telephone companies,

and other stores do a lot of business during these holidays.

1. Which is NOT a reason for children to show love and respect for their parents? [ ]

A. Their parents bring them up.

B. Their parents give love and care to them.

C. Their parents educate them to be good persons.

D. Their parents passed away before they grew up.

2. What do you learn from the passage?[ ]

A. Mother's Day and Father's Day are both in May.

B. Fewer women worked outside the home in the past.

C. Not all the children respect their parents.

D. Fathers are not as important as mothers at home.

3. Which do you think is RIGHT about "carnation"? [ ]

A. It only has two kinds of colour.

B. It refers to the special clothes people wear on Mother's Day or Father's Day.

C. It's a kind of flower showing love and best wishes.

D. People can wear carnations only on the second Sunday in May.  

4. On Mother's Day and Father's Day, _____.[ ]

A. people usually have family parties

B. everyone goes to visit the cemetery

C. children always go to their parents' home

D. hand-made cards are the most valuable gifts

5. What do you think the underlined word "florists" do? [ ]

A. They sell flowers.

B. They sell special clothes for Mother's Day and Father's Day.

C. They offer enough room for having family parties.

D. They make bread or pastry (点心).

心肌梗死合并心律失常最多见的是（）

A.阿-斯综合征

B.房性心律失常

C.缓慢性心律失常

D.室性心律失常

E.快速心律失常

《春江花月夜》的语言优美，韵律婉转，主要表现在（）

A、四句一换韵，共九韵

B、平仄交错，抑扬相交

C、对仗工整

D、语言晦涩

多数高出坠落事故的发生是因为安全带及安全网等劳动保护防护用品管理的缺失，反映了（）管理方面的问题。

A、劳动保护

B、职业健康安全

C、职业卫生

D、职业病防治

E、安全生产