胆道疾病首选的诊断方法是（） A.经皮肝穿刺胆道造影（PT C. B.静脉胆道造影

Who give us life, raise us and are our constant support and well­wishers？Our mothers. That’s why millions of people across the world take Mother’s Day as an opportunity to express thanks and send best wishes to their moms.

However, the celebration of Mother’s Day is not the recent thing that many believe it to be. It was the ancient Greeks who started the tradition by celebrating their annual spring festival in honor of Rhea, the mother of many gods and goddesses.

Later, in the 1600s, Mothering Sunday came to be celebrated in England. On the fourth Sunday of Lent (大斋期), children brought flowers and special fruitcakes to show their respect for their mothers. It may be the root of the modern Mother’s Day.

Thanks to the great efforts of Julia Ward Howe and Anna Jarvis, Mother’s Day became an official festival in the US. It is celebrated on the second Sunday in May. Later, many countries began to celebrate this day as Mother’s Day.

Today, Mother’s Day is an international festival honoring mothers. It is celebrated all over the world in different ways. In Western countries，the most common way is to treat mothers with breakfast in bed .Kids often allow their mothers to sleep till late in the morning while they prepare her favorite breakfast with their fathers. Some also make hand­made gifts or buy beautiful carnations (康乃馨). It is the day when you acknowledge your mothers contribution in your life and pay a tribute (礼品) to her, often with flowers and gifts. It complements Father’s Day, the celebration honoring fathers.

Today, Mother’s Day is a day celebrated on various days in many places around the world.

小题1:Why do people across the world celebrate Mother’s Day?

A．Because they want to express thanks and send best wishes to their mothers.

B．Because they want to express thanks and send best wishes to Rhea.

C．Because Mother’s Day is an official festival in the US.

D．Because Mother’s Day is an international festival.小题2:The modern Mother’s Day came from________.

A．Greece

B．China

C．America

D．England小题3:From the passage we can learn that________.

A．Rhea is the mother of many gods and goddesses of England

B．many people wrongly believe Mother’s Day has a short history

C．in America Mother’s day is celebrated on the fourth Sunday of Lent

D．on Mother’s day fathers have to get up early to prepare breakfast小题4:The passage mainly wants to tell us________.

A．how to celebrate Mother’s day

B．what to do on Mother’s day

C．the historical change of Mother’s day

D．the meaning of Mother’s day

锅炉汽包水位的虚假水位变化大小与汽包压力和蒸发量有关。

下述哪一条不是局部E-R图集成为全局E-R图时可能存在的冲突 ( )

A．模型冲突

B．结构冲突

C．属性冲突

D．命名冲突

当发电机所发的有功功率大于（）kW，并持续60秒后，触发功率最大值超限1故障停机。

A.1800kW

B.1700kW

C.1550kW

D.1600kW

液面过高不会导致二次汽冷凝水带碱。