在双发单独供电系统中，当由外电源或APU.G向机上供电时，下面的断路器必须闭合：（）

某男，41岁。脘腹胀痛，硬痛拒按，下利纯稀水，身热口渴，神倦少气，谵语，舌苔焦黄，脉虚。治疗当首选

A．大承气汤

B．大黄牡丹汤

C．黄龙汤

D．大黄附子汤

E．十枣汤

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.

These two days make us think about the changing roles of mothers and fathers. More mothers are now working outside home. More fathers must help with the children care.

These two special days are celebrated in many different ways. On Mother’s Day, people wear carnations. A red one symbolizes a living mother, while a black one shows the mother is dead. Many people attend religious services to honour parents. It is also a day when people whose parents are dead visit cemetery ( 墓地). On these days, families get together at home, as well as in restaurants. They often have outdoor barbecues 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.

小题1:Which of the following is NOT a reason for parents show love and respect for parents?

A．Parents bring up children

B．Parents give love and care to children

C．Parents educate children to be good persons

D．Parents pass away before children grow up小题2:Which do you think is true about “carnation” mentioned in paragraph 3?

A．It has only two kinds of colours

B．It refers to the special clothes people wear on Mother’s Day or Father’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小题3: What can we 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小题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 parents’ home

D．hand-made cards are not valuable

一般了解土壤污染情况时，采样深度只需取（）和（）的土样。如要了解土壤污染深度，则应按（）分层取样。

法拉第电磁感应定律表明，线圈内磁通变化的速率越大则感应电动势越小。