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在运行中的高频通道上进行工作时，（）才能进行工作。
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高频收发信机投产时要求收信电平不低于16dB，此电平是（）。
闭锁式纵联零序方向保护在一次停电状态下，模拟正向故障试验。试验时，两侧收发信机投入直流与远方启信回路，高频通道接线完整，且通道指标正常；()。
Directions:
Read the text below.Write an essay in about 120 words, in which you should summarize the key points of the text and make comments on them. Try to use you own words.
It&39;s the graduation season again. According to a latest survey, most Chinese graduates have high salary expectations, and thus prefer working for foreign companies or state-owned enterprises in first-tier cities.
The survey was conducted by renren.com, a Chinese social media site similar to Facebook.The results show that among 1,510 respondents, more than 64.7 percent want to work in first-tier cities.
In addition, 29.4 percent of the graduates who were born in the 1990s want to work for foreign companies, 25.5 percent for SOEs and 23.5 percent for private companies.
One interesting revelation is that although there are less than 100 days before graduation and more than half of the respondents have yet to get a job offer, they are not lowering their salary expectations. Apparently, 41.2 percent aim for 8000-10000 yuan ($1279- $1599) per month and 31.4 percent for 4000-6000 yuan.
According to the data released by the Chinese Academy of Social Sciences, the average monthly salary in Beijing was 5826 yuan($ 931 ) last year, while the numbers for Shanghai, Tianjin and Chongqing were 5380, 4058 and 3995 yuan respectively.
A sample of comments in Weibo: "Are the survey results only jokes for April Fools&39; Day？ Don&39; t daydream anymore! Please check if you have a good command of English and professional skills that deserve a decent job with a high pay. " On other comments says:" Some of my classmates got offers from foreign banks, international accounting firms and other famous foreign companies. They are told their yearly salary can reach 100,000 yuan ($15,990). "
The manager suggested that the meeting ____ till next week.
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