A、0.8<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/15547057599980db76efda57a42b5a2cf6b95b968cd1cimage1.png" style="width:34px;height:21px;">
B、1.0<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/155470576009032b8e529d00e47a9ae846579648d0462image1.png" style="width:34px;height:21px;">
C、3.0<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/155470576019693c3e09bcf3e4cc7861862b10aa4d78fimage1.png" style="width:34px;height:21px;">