哪一种线缆最可能使用RJ-45连接器来将计算机接入网络？（）
A.10Base2
B.10Base5
C.10BaseT
D.10BaseFL
参考答案：C
Many Chinese believe 31 (eat) pig brains will increase their intelligence and some Americans regularly eat 32 ___ (cook) eggs to keep their minds sharp. 33 , doctors don’t recommend eating 34 raw eggs or animal brains. Then, what food is good for your brain? Scientists have found a relationship 35 ____ diet and a healthy brain. Generally speaking, fish is a brain food. 36 ____ fish, you should introduce lots of dark green leafy vegetables and colorful fruits into your diet, because most people lack the special vitamins 37 these brain food provide. If you eat brain foods 38 ____ (regular), they can increase brain power — help you pay attention, keep you 39 ___________ (motivate), improve your memory and 40 _____( less) stress from studies. Then you can do much better in your test.
交－直－交变频调速属于（）。
A、一次换能
B、二次换能
C、三次换能
D、四次换能
