U. S. Eats Too Much Salt

    People in the United Statesconsume more than twice the recommended amount¹ of salt, raising their risk for high blood pressure, heart attacks and strokes, government health experts said on Thursday.

    They found nearly 70 percent ofU. S.adults are in high-risk groups that would benefit from a lower-salt diet of no more than 1,500 mg per day²，yet most consume closer to 3,500 mg per day.

    “It’s important for people to eat less salt. People who adopt a heart-healthy eating pattern that includes a diet low in sodium and rich in potassium and calcium can improve their blood pressure,”Dr. Darwin Labarthe of the Centers for Disease Control and Prevention said in a statement.

    “People need to know their recommended daily sodium limit and take action to reduce sodium intake,” Labarthe said.

    The study in CDC’s weekly report on death and disease used national survey data to show that two out of three adults should be consuming no more than 1，500 mg of sodium per day because they are black or over the age of 40一which are considered high-risk groups.

    Yet studies show most people in theUnited Stateseat 3,436 mg of sodium per day, according to a 2005–2006 CDC estimate.

    Most of the sodium eaten comes from packaged, processed and restaurant foods. The CDC said it will join other agencies in the Health and Human Services department in working with major food manufacturers and chain restaurants to reduce sodium levels in the food supply.

    Nationwide, 16 million men and women have heart disease and 5.8 million are estimated to have had a stroke. Cutting salt consumption can reduce these risks, the CDC said.

词汇：

sodium/ "səʊdɪəm/ n.钠

potassium/pəˈtæsiəm/n.钾

calcium/ "kælsɪəm/ n.钙

intake / ˈɪnteɪk/n.纳入量

注释:

1.more than twice the recommended amount：比推荐量的两倍还多

2.They found nearly 70 percent ofU. S.adults are in high-risk groups that would benefit from a lower-salt diet of no more than 1,500 mg per day：他们发现将近分之七十的美国成年人属于高危人群,如果他们的日食盐量降至l,500毫克,则会从中受益。

How much salt do most American adults eat per day?

A:No more than 1,500 mg B:Closer to 3,500 mg C:Less than 3,436 mg D:Closer to 1,500 mg

设M、N为随机事件，P（N）>0，且条件概率P（M|N）=1，则必有（　）.

A:P（M∪N≥P（M） B:P（M∪N>P（N） C:P（M∪N）=P（M） D:P（M∪N）=P（N）

设M、N为随机事件，P(N)＞0，且条件概率P(M|N)=1，则必有（）

A:P(M∪N)＞P(M) B:P(M∪N)＞P(N) C:P(M∪N)=P(M) D:P(M∪N)=P(N)

设M、N为随机事件，P（N）>0，且条件概率P（M|N）=1，则必有（　）.

A:P（M∪N≥P（M） B:P（M∪N>P（N） C:P（M∪N）=P（M） D:P（M∪N）=P（N）

设M、N为随机事件，P(N)＞0，且条件概率P(M|N)=1，则必有（）

A:P(M∪N)＞P(M) B:P(M∪N)＞P(N) C:P(M∪N)=P(M) D:P(M∪N)=P(N)

若有说明：int n=2，*p=＆n，*q=p；，则以下非法的赋值语句是（ ）。

A:p=q； B:*p=q； C:n=*q； D:p=n；