小儿用普鲁卡因作局部浸润麻醉，一次性最大剂量不应超过（）
A.4mg/kg
B.6mg/kg
C.8mg/kg
D.10mg/kg
E.12mg/kg
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读“洋流示意图”,完成30 —31题。
小题1:若A—B是回归线,下列说法正确的是
A．该环流分布在北半球
B．分布在南半球
C．乙洋流受信风影响形成的
D．丁是受西风影响形成的小题2:若A—B是极圈,那么
A．甲是暖流
B．乙是暖流
C．丙沿岸有沙漠分布
D．甲沿岸是温带海洋性气候
通过流量方程式计算出来的管道直径是准确值。
阅读理解。
阅读下面短文并回答问题(请注意问题后的词数要求)。
The worst US economic depression in the recent 70 years is forcing senior citizens out of retirement,
leaving them fighting for jobs in a weak labor market or risking homelessness.
The study by Experience Works, released on Tuesday, showed 46 percent of the 2,000 low income
people over 55 years who participated needed to find work to keep their homes. Nearly half of them had been searching for work for more than a year.
"These people are at the age where they understandably thought their job-searching years were
behind them,” said Cynthia Metzler, president and CEO of Experience Works.
"Bur here they are, many in their 60s, 70s and beyond, desperate to find work so they can keep a
roof over their heads and food on the table.”
According to the study, many of the participants had no intention of working past their 60 th birthday, but _______ after being laid off or following the death of the partner. Over a third of the participants had
retired.
Ninety percent of the respondents 76 years and older planned to continue working for the next five
years.
Huge medical bills due to a persona illness or that of a partner were also reasons for coming out of
retirement, the survey found. The longest and deepest economic decline since the 1930s is making finding
a job for the low-income elderly workers a difficult challenge.
The Experience Works study found that 46 percent of the elderly jobseekers were sometimes forced
to choose between paying rent and buying food or medication. Almost three-quarters believed their age
made it harder to compete for jobs with younger workers.
"This study underscores calls for the need to create policies that remove barriers to employment for
elder workers and provide additional programs and services specifically aimed at helping elder people
re-enter the work force or remain working,” said Metzler.
1. What’s the main idea of the passage? (no more than 12 words)
_______________________________________________________________________________
2. Fill in the blank in Paragraph 5 with proper words. (no more than 5 words)
_______________________________________________________________________________
3. Complete the following statement with proper words. (no more than 3 words)
The people over 55 years are hard to avoid the feeling that they have passed the age of
________________________________________________________________________________
4. What might be the solution to the problem according to the study? (no more than 15 words)
________________________________________________________________________________
5. What does the word “them” (line2, paragraph 2) probably refer to? (no more than 7 words)
________________________________________________________________________________
设已知一汉字的国标码是5E48H，则其内码应该是______。
A) DE48H
B) DEC8H
C) 5EC8H
D) 7E68H
认证技术包括（）、（）和身份认证，而身份认证的方法主要有口令、磁卡和智能卡、（）、（）。