对于回油机械雾化器,当进油压力不变时,随着回油量的增加,总的进油量增加,喷油量也增加。
参考答案:错
If only he _____ in time tomorrow, I’ll take him along to Beijing.
A.will arrive
B.is going to gel
C.arrives
D.is about to reach
重症肌无力最常合并的疾病是()
A.甲状腺肿瘤
B.胸腺增生或胸腺瘤
C.小细胞肺癌
D.系统性红斑狼疮
E.多发性肌炎