缺词填空(5分)

We usually buy things in a shop, a market or a supermarket. Shopping always takes too much t________ . We have to walk around for a long time to look f________ the things we want. Sometimes we have to c________ many heavy shopping bags. We’re always very tired after s_________. Now it’s different from that in the past(过去). We can do many things at h________, we don’t need to go to the shop. We can buy many good and c_______ things on the Internet(因特网), they look nice but don’t cost much. It seems easy and quick, b_______ it sometimes brings us some trouble(麻烦). The clothes you buy on the Internet are d________ from what you want, or the size is too s_______ or too big. You may see many people wear the same clothes in the street. Do you know why? B________ they all buy clothes on the Internet. How interesting!

T波低平指的是（）

A.T波振幅<同导联R波1/10

B.T波振幅>同导联R波1／4

C.T波振幅<同导联P波1/10

D.T波振幅>同导联R波1/10

E.T波振幅<同导联U波1／2