A bypass line provided around a waste heat auxiliary boiler in a diesel engine exhaust system, may be used to avoid boiler ______.
A. corrosion at low engine loads
B. erosion at high engine loads
C. overload at high engine loads
D. scaling at all exhaust temperatures
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国际标准对温室气体验证公司的要求的目的和作用是什么？
患者全血细胞减少,疑急性白血病或再生障碍性贫血,下列哪项对白血病诊断最有意义
A. 骨髓增生低下
B. 红细胞系及巨核细胞系受抑制
C. 某系原始＋早幼(幼稚)细胞≥30%
D. 骨髓细胞以成熟淋巴细胞、浆细胞增生为主
E. 骨髓增生明显活跃
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