浮箍
参考答案：装在套管鞋上部接箍内的可钻式止回阀。
Some students still use mobile phones in class ________ what the result will be.[ ]
A. instead of
B. in place of
C. in memory of
D. regardless of
脑梗死在脑血管病中最常见约占（）
A.50-60%
B.60-70%
C.40-50%
D.60-90%
E.30-40%
