题目内容
What's the talk mainly about？
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SECTION B PASSAGES
Directions: In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow.
听力原文： It was an Italian inventor who created the first wireless device for setting out radio signals in 1895. But not until the American inventor Lee De Forest built the first amplifying vacuum tube in 1906 did we get the first radio as we know it. And the first actual radio broadcast was made on Christmas Eve of 1906. That's when someone working from an experimental station in Brand Rock, Massachusetts, arranged the program with two short musical selections of poem and brief holiday greeting. The broadcast was heard by wireless operators on ships with a radio through several hundreds miles. The following year, De Forest began regular radio broadcasts in New York. These programs Were similar to much what we hear on radio today. In that, De Forest played only music. But because there were still no home radio receivers, De Forest's audiences consisted only of wireless operators on ships in New York Harbor. There is no doubt that radio broadcasting was quite a novelty in those days, but it took a while to catch on commercially. Why？ Hmm, for the simple fact that only a few people, in fact, only those who tinkered with wireless telegraphs as a hobby owned receivers. It wasn't until the 1920s that someone envisioned mass appeal for radio. This was radio pioneer David Sarnoff who predicted that one day there would be a radio receiver in every home.
Why were early radio broadcasts heard by such a small audience？
听力原文： A suicide bomber attacked a bus station in southern Israel Sunday, critically injuring two Israeli security guards. Hours later, Israel approved a border security deal with Egypt to facilitate a complete Israeli pullout from the Gaza Strip.
A Palestinian suicide bomber tried to board a bus at the central station in the southern Israeli city of Beersheba during morning rush hour at the start of the work week. But he aroused the suspicion of the bus driver. Police say security guards chased the bomber, and he blew himself up.
"I saw a terrible ball of fire right in front of my eyes," eyewitness Nissim Vaknin told Israel Radio.
The explosion could have caused mass casualties, had the bomber succeeded in boarding the bus.
The attack came less than a week after Israel completed its evacuation of Jewish settlers from the Gaza Strip.
According to the news, Israeli approval of a border security deal with Egypt would ______.
一天你去上班。同事以异样的眼神看着你，让你不知所措，同时你发现网上有一个帖子说你工作生活得不好。有工作单位、地址、电话，面对这帖子你怎么做？
【C20】
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