1.At the end of this term,they`ll finish learning 30 courses.
. b1 s/ _; J3 f8 v! a3 [2.At 1940s,IBM designed the first generation of the electronic computer.5 Y5 `; I# @. c, n4 p
3.We`ve done that experiment before.
, }% X9 H% M& ~6 s+ ], S4.At the early age of 1820s,people have noticed that this phenomenon is very useful.( v/ M0 B, h& X8 s: a# V
5.Nowadays,computer is widely applied into all kinds of fields.1 r# P: ]+ H) i. [3 Y) B
6.经验告诉我们没有什么比管住自己的嘴/谨言慎行还难的了。 |