比一比，再组词。 浆（ ）　讥（ ）　频（ ）　篇（ ） 奖（ ）　饥（ ）　领（

血氨升高常见于（）

A.尿毒症

B.上消化道出血

C.肝性脑病

D.贫血

E.低蛋白饮食

组装计算机可分为四个步骤，下列组装顺序正确的是

A．格式化硬盘→分区硬盘→硬件组装→安装操作系统

B．硬件组装→格式化硬盘→安装操作系统→分区硬盘

C．硬件组装→分区硬盘→格式化硬盘→安装操作系统

D．格式化硬盘→硬件组装→分区硬盘→安装操作系统

化学与生产、生活和社会热点紧密联系．

（1）2010年春，我国南方地区发生严重旱灾．人工降雨是缓解旱情的重要手段，干冰可用于人工降雨，其原理是______．干冰转化成的二氧化碳气体可在大棚蔬菜种植中做气态肥料，原因是______；

（2）用石灰浆[Ca（OH）₂]粉刷墙壁后的室内放置一燃烧的煤炉，可使墙壁迅速硬化，同时墙壁上会出现一些水珠，其原因是（用化学方程式表示）______；

（3）2009年10月以来甲型H1N1型流感呈现出在全球蔓延的趋势．莽草酸（化学式为C₇H₁₀O₅，）是生产治疗甲型H1N1型流感药物“达菲”的关键原料，根据化学式你能获得的信息是______（答出两条）．

我国化学试剂中分析纯试剂的标签为绿色.

"Clean your plate!" and "Be a member of the clean-plate club!" Just about every kid in the US has heard this from a parent or grandparent. Often, it’s accompanied by an appeal. "Just think about those starving orphans (孤儿) in Africa!"
Sure, we should be grateful for every bite of food. Unfortunately, many people in the US take a few too many bites. Instead of saying "clean the plate," perhaps we should save some food for tomorrow.
According to news reports, US restaurants are partly to blame for the growing bellies (肚子). A waiter puts a plate of food in front of each customer, with two to four times the amount recommended by the government, according to a USA Today story.
Americans traditionally associate quantity with value and most restaurants try to give them that. They serve large portions to stand apart from competitors and to give the customers value. They prefer to have customers complain about too much food rather than too little.
Barbara Rolls, a nutrition professor at Pennsylvania State University, told USA Today, that restaurant portion sizes began to grow in the 1970s, the same time that the American waistline began to expand.
Health experts have tried to get many restaurants to serve smaller portions. Now, apparently, some customers are calling for this too. A restaurant industry trade magazine reported last month that 57 percent of more than 4 000 people surveyed believed restaurants serve portions that are too large; 23 percent had no opinion; 20 percent disagreed.
But a closer look at the survey indicates that many Americans who can’t afford fine dining still prefer large portions. Seventy percent of those earning at least $150 000 per year prefer smaller portions, but only 45 percent of those earning less than $ 25 000 want smaller.
It’s not that working class Americans don’t want to eat healthy. It’s just that, after long hours at low-paying jobs, getting less on their plate hardly seems like a good deal. They live from paycheck to paycheck, happy to save a little money for next year’s Christmas presents.

US restaurants provide large portions of food because ______.

A. most customers are calling for that
B. they want to win in severe competition
C. the American waistline is expanding
D. it is the regulation of the restaurant industry