服毒后最好几小时内洗胃（）。 A.1 B.3 C.6 D.12 E.24

已知电流表的内阻R_g=10Ω，满偏电流I_g=3mA．要把它改装成量程是6V的电压表，应______联一个电阻，其阻值R=______Ω．

按数值的表示方法，误差分为绝对误差和（）误差。

阅读理解

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项.选项中有两项为多余选项。

     Traditional fisheries may no longer be the world's most important provider of fish.  1 . The Food and

Agriculture Organization says aquaculture is growing by a rate of 6.6 percent a year.

     Aquaculture now produces forty-six percent of the world's supply of fish.  2 . The report also said

aquaculture earned more money in 2008 than traditional fisheries.

    In aquaculture, fish are raised in tanks or small bodies of water called ponds. They also are raised in

cages or nets in oceans, lakes and rivers.

     The report says increased aquaculture has helped people around the world eat record amounts of

fish.  3. But the FAO says the current yearly wild-fish harvest of 90 million tons shows no improvement.

Decreasing numbers of fish and stronger catch limits have reduced the possibilities for catching wild fish.

     The FAO report says about thirty-two percent of world supplies are overfished, depleted(大量削减)

or recovering. It said these supplies of fish need to be urgently rebuilt.

      4. They say the nets and cages permit fish diseases and pests to spread. Some aquaculture critics

doubt that aquaculture can keep growing at the current rate. But Wally Stevens of the trade group

Global Aquaculture Alliance says the industry must continue developing to feed growing populations.

     Mr. Stevens says a one hundred percent increase in fish farming over ten years is necessary to keep

providing for people at the current level. He notes that aquaculture creates jobs and wealth, especially

for people in coastal areas of China. The FAO reports that China remains the world's largest

fish-producing nation.  5.

A. Hungary is rich in waterways, but traditionally most Hungarians eat fish only at Christmastime.

B. A new United Nations report shows that fish farming or aquaculture may soon lead fish production.

C. Last week a study of one hundred ninety-nine countries and territories confirmed what many people

may have already noticed.

D. The FAO says each person ate an average of almost 17 kilograms of fish last year.

E. China produces more than sixty percent of the world's farmed fish.

F. That represents a forty-three percent increase from 2006.

G. Some scientists have criticized aquaculture.

相和歌

现金管理系统中签约客户的收费日期为（）。

A.收费次日

B.每日

C.每月24日

D.每月月末