用什么来限制低弱回声的显示()
A.增益
B.抑制器
C.时间增益补偿(TGC.)
D.敏感性
E.放大器
参考答案:B
下列词语中加点的字,读音全都正确的一组是
A.晕车(yūn)城垣(yuán)安步当车(dàng)奄奄一息(yǎn)
B.下载(zài)绯闻(fēi)量体裁衣(1iàng)天遂人愿(suì)
C.校正(jiào)胆怯(qiè)山川湖泊(bō)抛头露面(lù)
D.召唤(zhào)间隔(jiān)锲而不舍(qiè)管窥蠡测(lí)
_____ the king cobra looks scary, it is not as _____ as the golden poison dart frog.[ ]
A. But, dangerous
B. Although, poisonous
C. Although, danger