下列哪项是心室壁肿瘤的特点（）
A.肿瘤活动度大
B.突向心脏有蒂
C.随心动周期有规律活动
D.室壁明显增厚
E.心包壁层有团块回声
参考答案：D
The girl looked at me with a _____expression. Maybe the problem was quite ____.
A．puzzled; puzzling
B．puzzling; puzzled
C．puzzled; puzzled
D．puzzling; puzzling
空调低压风管严密性检验采用抽样检验，抽检率为（）。
