大型低速柴油机的气缸注油器一般采用（）。
A.多柱塞泵
B.柱塞泵
C.齿轮泵
D.螺杆泵
参考答案：A
能测出梅毒螺旋体特异抗体的试验是（）。
A.荧光密螺旋体抗体吸收试验
B.捕获ELISA法
C.梅毒螺旋体制动试验
D.非密螺旋体抗原试验
E.梅毒螺旋体血凝试验
The weather yesterday was it is today. [ ]
A. not as wetter as
B. much wetter than
C. more wetter than
D. wetter as
