风力发电机组要保持长周期稳定的运行,做好维护工作是致关重要。()
参考答案:对
28岁经产妇,人工流产术后半年,术后断续 * * 流血,量不多,术后一直避孕。尿妊娠试验阳性,查子宫超鸭卵大、软。胸片见两肺中下部有多处散在棉絮团影。本例最可能的疾病是()。
A.吸宫不全
B.葡萄胎
C.侵蚀性葡萄胎
D.绒毛膜癌
E.胎盘部位滋养细胞肿瘤
. He ____ in the north, but now he ____ here.
A.used to live; is used to the life
B.use to live; is used to live
C.used to living; is used to living
D.used to live; is used to live