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当前学科：金属非金属矿山安全作业
题目：
判断题
梳式通风网路适于开采多层密集脉状矿体和对通风要求较高的矿井。
A
对
B
错
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推荐知识点:
高速钢銑刀的切削温度一般控制在（）摄氏度以下。
据统计，每年地球上的植物能量相当于目前人类消耗矿物能的（）倍。
下列哪项不属于第一性征发育（）
急性化脓性腮腺炎病因最主要是（）
The easy way out isn’t always easiest. I learned that lesson when I decided to treat Doug, my husband of one month, to a special meal. I glanced through my cook book and chose a menu which included homemade bread. Knowing the bread would take time. I started on it as soon as Doug left for work. As I was not experienced in cooking, I thought if a dozen was good, two dozen would be better, so I doubled everything. As Doug loved oranges, I also opened a can of orange and poured it all into the bowl. Soon there was a sticky dough covered with ugly yellowish marks. Realizing I had been defeated, I put the dough in the rubbish bin outside so I wouldn’t have to face Doug laughing at my work. I went on preparing the rest of the meal, and, when Doug got home, we sat down to Cornish chicken with rice. He tried to enjoy the meal but seemed disturbed. Twice he got up and went outside, saying he thought he heard a noise. The third time he left, I went to the windows to see what he was doing. Looking out, I saw Doug standing about three feet from the rubbish bin, holding the lid up with a stick and looking into the container. When I came out of the house, he dropped the stick and explained that there was something alive in out rubbish bin. Picking up the stick again, he held the lid up enough for me to see. I felt cold. But I stepped closer and looked harder. Without doubt it was my work. The hot sun had caused the dough to double in size and the fermenting yeast made the surface shake and sigh as though it were breathing. I had to admit what the living thing was and why it was there. I don't know who was more embarrassed by the whole thing—Doug or me. When Doug went out the third time, the woman looked out of the window because she was（）
患者，男，19岁，诊断骨髓增生异常综合征，有输血史，无放疗和化疗史。需要输血治疗。检查血型时，正定型，患者红细胞与抗A、抗B抗体均不凝集。同时用标准A型红细胞试剂、B型红细胞试剂检测。结果：Bc（3+）Ac（-）。从正反定型结果可知该患者血型是（）。
修剪
国内最大的第三方支付平台是（）
腈纶膨体纱的生产是利用了其（）.