安全生产费用的提取标准根据企业的性质不同而区分。道路危险货物运输企业按营业收入的（）

一项工程甲独做20天完成，乙独做24天完成，甲做11天的工作量，甲乙合做要几天？

At one time it was the dream of many little girls to become a nurse. Today, however, America is facing its worst nurse shortage since World War I. Recently about 2,000,000 nurses are needed and 60 percent of all hospitals in the US have shortages, large enough to threaten the quality of care provided. The demand for nurses spreads widely throughout the nursing field.

What has become of these women in white? The answer lies in not one but several causes. One possibility is the fact that women have greater career options. In the past, women who chose to work outside the home had two basic choices: nursing or teaching. Today, more women than ever are in the workforce, but their options have greatly increased. There are women doctors, lawyers, firefighters and police officers. In fact, women today are found in nearly every field of work. Nursing has been left behind, as women move on to jobs with higher pay and greater status. A woman or man in the nursing field is often looked down upon as“merely a nurse”. Teachers many be also at fault. Many high school students are actually away from nursing, told by teachers that they are“too bright to be a nurse”.

Americans are living longer than ever and requiring more medical attention. In fact, the number of elderly patients has almost doubled in the past twenty years. Obviously a larger population requires more nurses. AIDS and other diseases have caused more and more people to need nursing care. Usually fatal (致命的) diseases mean long hospital stay, that is to say, more nurses are needed to care for these patients. It is estimated that the demand for nurses will be doubled the supply in the coming ten years.

小题1:What does the second paragraph mainly talk about?

A．How nurses have been looked down upon.

B．Why women have chosen many different jobs.

C．What has caused nurse shortage.

D．How teachers have influenced their students.小题2:The Passage tells that high school teachers are at fault for      .

A．not mentioning the worst nurse shortage in the US

B．introducing jobs with higher pay and greater status to their students

C．not asking the government to raise the nurses’ payment

D．persuading the students not to be nurses小题3:The author writes the Passage in order to        .

A．describe the unequal treatment of women in the US

B．warn people to pay more attention to the nursing problem

C．tell us women’s free choices of jobs today

D．call on women to choose different kinds of jobs小题4:It can be inferred from the Passage that       .

A．high school students think themselves too bright to be nurses

B．women in the US have greater career choices than those in other countries

C．of all the hospitals in the world 60 percent more nurses are badly needed

D．nursing used to be a popular job among women

在关系模型中，把数据看成一个二维表，每一个二维表称为一个 【5】 。

根据目标人群对媒介的拥有情况和使用习惯来选择传播媒介。符合传播媒介选择的（）

A.保证效果原则

B.针对性原则

C.速度快原则

D.可及性原则

E.经济型原则

治疗血精的大法是（）。

A.补肾摄精，益气止血

B.补肾填精，活血止血

C.滋肾养阴，益气止血

D.补肾摄精，清火凉血

E.滋肾养阴，清火凉血