肛指检查简单易行,一般可发现距肛门________之内的直肠内肿瘤。
参考答案:7~8cm
下列哪个公式正确表示了国产汽车车辆购置税的收取方式()
A、车价×10%
B、车价÷1.17×10%
C、车价×17%
The bypass valve on a self-contained breathing device should be opened if().
A.you are entering a space containing poisonous vapors
B.you are entering a space containing explosive gases
C.the regulator of the breathing apparatus malfunctions
D.the face piece of the breathing device is too tight