余热锅炉运行时,负压增大是由于系统调整不当或锅炉泄漏。
参考答案:对
After the final exam, I think all the students want _________.
A.stop to have a rest
B.to stop having a rest
C.to stop to have a rest
D.stopping to have a rest
女,24岁,右颈肿块,无疼痛,局部皮肤无红、肿、痛、热表现。
检查时若肿块为多个,或成串,大小不等,全身有低热,甲状腺正常,则诊断应考虑()。
A.甲状腺功能亢进
B.颈淋巴结核
C.颈部血管瘤
D.恶性淋巴瘤
E.颈部神经节细胞瘤