“五更泄”属于（）。 A.大肠湿热 B.脾气亏虚 C.肝郁犯脾 D.肾虚命门火衰 E

某地15人接种某疫苗后，测得其抗体滴度从1：20到1：320不等，为求其平均滴度，最好选用（）。

A.众数

B.算术均数

C.几何均数

D.中位数

E.百分位数

操作技能培养有哪些要求

阅读理解。

     Barack Obama makes his first trip to Asia as president this week, leaving behind a host of domestic

problems with the visit that recognizes the region's economic and diplomatic importance. "Obama's trip

includes stops in Japan, Singapore, China and South Korea, and his message will be simple," says Nicolas

Lardy at the Peterson Institute for International Economics, "Well, I think his broadest objective is to

convince Asians that the United States is fully committed to the region that we have an agenda that's much

broader than they saw over the past eight years of the very heavy focus on counter terrorism."

     Obama's first stop is Japan, where he meets with the new Prime Minister Yukio Hatoyama who has

promised to steer a diplomatic course more independent of Washington. While Japan is seen as a getting-to-

know-you stop, when Obama heads to the Singapore for the APEC meeting, he will likely face pressure on

trade. "Many Asians are concerned about what US trade policy will be, and they've been somewhat alarmed

by the fact that the president really hasn't set out very much revision for what US trade policy is in his

administration."

     But the critical leg of the trip will come in China, his third stop where Obama will have to navigate the

complex relationship with the country that is the largest holder of US debt. "As you say, you know, if you

owe the bank one dollar, it's your problem, if you owe the bank, you know, 3 million dollars, it's the bank's

problem, so it's similar with China. I mean they have no interest in trying to use the influence with us, because

eventually, they're the one that they own all those dollars."

     Also on the table will be North Korea and Iran's nuclear ambitions as well as cooperation on Afghanistan.

     With Obama enjoying sky high popularity ratings in the countries he is visiting, concrete results may be

beside the point, given that Obama is still in his firs office, analysts say this trip is mostly about laying the

ground work for the future. 

1. From the second paragraph, we can infer that _____. [ ]

A. Japan and Singapore will give America some pressure on trade

B. Japan has not been the closest friend of America

C. Japan decides not to rely on America too much

D. Japan is concerned about what US trade policy will be

2. The word "leg" in the third paragraph probably means _____. [ ]

A. the two long parts of your body that your feet are joined to

B. one of the parts of a football match that is played in two halves

C. a part of a long journey or process that is done one part at a time

D. one of the upright parts that supports a piece of furniture

3. What can you infer about China's relation with America in the third paragraph? [ ]

A. It will hurt China if the value of the dollar falls.

B. China will sell all its shares in US national debt.

C. China is US's overseas bank where US can borrow money.

D. China will not be the largest debt holder of US.

4. The author develops the passage mainly _____. [ ]

A. by cause and effect

B. by examples

C. by order in time

D. by comparison

离心泵在启动之前需要（），避免空运转。

A、切泵

B、加润滑油

C、灌泵

D、盘车

基于法定事实被辞退的公安民警，不享受待业保险。 ( )