The water in an auxiliary boiler should be chemically tested daily for alkalinity and .
A. soap hardness
B. nitrogen content
C. chloride content
D. dissolved CO2
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关于颅脑扫描基线和应用的叙述，错误的是
A. 听眦线是外耳孔与眼外眦的连线
B. 头部CT检查常以此听眦线作为扫描基线
C. 听眉线是眉上缘的中点与外耳道的连线
D. 经听眉线扫描的图像对眼窝、中颅凹和后颅凹上部显示较好
E. 听眶线是眶下缘与外耳道的连线
不按照有关规定或者工作要求，向组织（)的，给予警告或者严重警告处分。
A twin-screw vessel can clear the inboard propeller and maneuver off a pier best by holding a（n)______.
A. Forward spring line and going slow ahead on the inboard engine
B. After spring line and going slow astern on the outboard engine
C. Forward spring line and going slow ahead on both engines
D. Forward spring line and going slow ahead on the outboard engine
进食以下（)时，人体脉率减慢。
A. 兴奋药水
B. 浓茶
C. 咖啡
D. 镇静剂
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