Man is the only animal that laughs.
What is the history of this "happy laughter", as someone once {{U}} (67)
{{/U}} it We are not {{U}} (68) {{/U}} of theories
to explain the mystery; researchers have been seeking a {{U}} (69) {{/U}}
explanation of laughter. One writer put {{U}} (70) {{/U}} the theory that
its function is to frighten others or to humiliate them. Another took the
opposite {{U}} (71) {{/U}} that we laugh in order not to cry. A
psychologist offered the explanation that laughter {{U}} (72) {{/U}} as a
remedy to painful experiences and it serves to protect a person from
{{U}} (73) A. which B. that C. what D. when
更多"Directions: There are 20 blanks in "的相关试题:
[单项选择] Fill in each of the following blanks with ONE Word to complete the meaning
of the passage.
Predictions of large populations of
robots in industry have yet to come true. For a decade or more, manufacturers of
big robots have explained how their machines can make industry more competitive
and productive. The market for 51 robots is now oversupplied,
and the driving force of the robotics (机器人技术) revolution is 52
to be with makers of machines that handle a few kilos at
most. "Heavy-robot manufacturers are in some difficulty
53 finding customers. They are offering big 54
just to get in the door. There has been a 55 growth
everywhere in the numbers of robots, so we have to admit we are either
deceiving 56 or that the market is slowly growing, "said John
Reekie, Chairman of Colne Robotics. "The following t A. small B. educational C. big D. business
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