1.At the end of this term,they`ll finish learning 30 courses.7 N* N3 [7 J9 A% y- D' a
2.At 1940s,IBM designed the first generation of the electronic computer. O5 U. ]6 x Z. T1 t
3.We`ve done that experiment before.+ X t/ D' a4 P0 n, ?. Z: J
4.At the early age of 1820s,people have noticed that this phenomenon is very useful.9 N0 M. _0 ^ `9 F8 K4 g
5.Nowadays,computer is widely applied into all kinds of fields. A2 {! S W) o1 \
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。 |