四六级听力:2010 Section A 对话1

科学60秒:山高万丈，实为错觉

Stand at the bottom of a big hill and you can exhaust yourself just thinking about climbing it. But a new study suggests it’s not as bad as it looks. Because people tend to ____1____ the steepne...

科学60秒:"以身犯险"诈骗术

Toss a piece of leaf onto a spiderweb. The spider is indifferent. Because leaves don't squirm like captured flies. But Australia's "assassin bug" _1_ spiders. It exploits their keen sense for vib...

朝鲜核武会谈有望重开(1)

美国务卿助理希尔称美朝核武会谈有望重开Christopher Hill, the U.S. assistant secretary of state, says a banking transfer that has held up North Korean nuclear diplomacy for months is likely to be r...