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【单选题】
男性，42岁。3天来右上后磨牙痛重，冷热加剧，夜间痛而来就诊。近1年多来，右上磨牙进食时咬到某特定位置时出现撕裂样痛，冷热敏感，平时咬物不适。检查： 咬合面似有近远中方向越过边缘嵴的细裂纹，颊尖高陡，无龋洞，不松动，叩痛（+）。 最可能的诊断是（）A.
可复性牙髓炎
B.
急性牙髓炎
C.
慢性牙髓炎急性发作
D.
急性根尖炎
E.
慢性根尖炎
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反馈参考答案：
举一反三
【单选题】When a vacuum boiling evaporator works, the hot jacket water will pass over the tube stack and ___ the sea water passing through the tubes.
A.
dispose
B.
dissolve
C.
heat
D.
dissipates
【单选题】Bottom blow valves are installed on auxiliary water-tube boilers to ___________.
A.
completely drain the boiler in an emergency
B.
prevent sludge from forming in the drum
C.
remove floating impurities from the boiler water surface
D.
remove settled solids from the water drum
【单选题】Auxiliary boilers can be classified as .
A.
water-tube natural circulation boilers
B.
fire-tube boilers
C.
water-tube forced circulation boilers
D.
all of the above
【单选题】Bottom blow valves are installed on auxiliary water-tube boilers to _____.
A.
remove suspended and precipitated solids from the boiler water
B.
completely drain the boiler in an emergency situation
C.
prevent hardened scale deposits in the water drum
D.
remove floating impurities from the oily water surface
【简答题】可用性的三个目标是:有效性,效率,()。
【单选题】During the scientific experiment, Mr. Chen carefully poured the water into the tube, with my classmates ____ beside to see what would happen.
A.
were standing
B.
stood
C.
standing
D.
to stand
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