根据网考网考试中心的统计分析，以下试题在2019/3/25日考博习题练习中，答错率较高，为：60%
【单选题】
Dinosaurs were reptiles which became extinct about 65 million years ago. The most intriguing question about dinosaurs has always been "{{U}} (21) {{/U}}did they die out " There is no simple answer to this question,{{U}} (22) {{/U}}many hundreds of scientists are studying the problem. They are not studying the extinction of the dinosaurs{{U}} (23) {{/U}}, but the whole question of extinction. Many other plants and animals have{{U}} (24) {{/U}}in the past, and it is important to understand{{U}} (25) {{/U}}this happeneD、Having this information could help save many species that are{{U}} (26) {{/U}}in the modern worlD、Humans are causing extinctions now, because of pollution and other damage{{U}} (27) {{/U}}the environment. Maybe the dinosaurs can tell us how to save the earth today,{{U}} (28) {{/U}}their extinction 65 million years ago! Some of the early dinosaur scientists, 100 years ago, thought the dinosaurs died out because the{{U}} (29) {{/U}}changed, and they could not breathe. Others thought that the dinosaurs disappeared simply because they became too big.
They were{{U}} (30) {{/U}}to move and could not find enough food{{U}} (31) {{/U}}One theory is that a huge killer meteorite{{U}} (32) {{/U}}the earth. Some scientists{{U}} (33) {{/U}}that the extinction of dinosaurs was possibly due to rapid{{U}} (34) {{/U}}of the planet’s climate. Perhaps huge amounts of lava pours out of volcanoes in IndiA、This sent up vast{{U}} (35) {{/U}}of dust that blacked out the sun, and made the earth icy colD、
A．as for
B．since
C．after
D．because of
网考网参考答案：C，答错率：60%
网考网试题解析：考查连接词的用法。as for至于；because of因为，由于；since自……以来。
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