lumps of 一块块（通常指形状不固定的坚硬物质）

iron-rich 含铁量高的

conduct 传导（热）

undersides 底部

out of sight 在视野之外，看不见

detection 探测

测验 请听报道并回答下列问题。

1. According to the text, what is the mystery that has puzzled scientists for a long time?

2. What technology does the Manchester team plan to use to find and dig up the missing meteorites?

3. True or false? The metal rocks are able to conduct the heat of the sun, which enables them to melt and sink downwards.

4. Which word in the text means 'in equal numbers or amounts'?

答案 1. According to the text, what is the mystery that has puzzled scientists for a long time?

The mystery that has long puzzled scientists is why so few iron meteorites are picked up off the ice of Antarctica.

2. What technology does the Manchester team plan to use to find and dig up the missing meteorites?

The Manchester team plans to find the missing meteorites and dig them up with the aid of landmine detection technology.

3. True or false? The metal rocks are able to conduct the heat of the sun, which enables them to melt and sink downwards.

False. The metal rocks are able to efficiently transfer heat to their undersides where they can melt the surrounding ice, and this allows them to sink downwards.

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