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【简答题】
在套管环间流动的流体,外管的内径是d 2 ,内管的外径是d 1 ,则当量直径d e =____。
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反馈参考答案：
举一反三
【简答题】“三网融合”中的“三网”是指互联网、________、广播电视网。
【单选题】听力原文：M: How do Jane and Bill like their new home? W: It's really comfortable, but they're tired of having to hear the jets go over their house at all hours. Q: What is located close to Jane and Bill's...
A.
A bus station.
B.
An airport.
C.
A super highway.
D.
A train station.
【单选题】听力原文：M: How do Jane and Bill like their new home? W: It's really comfortable, but they're tired of having to hear the jets go over their house at all hours. Q: What is located close to Jane and Bill's...
A.
An airport.
B.
A bus station.
C.
A super highway.
D.
A train station.
【单选题】图示结构中,AB为刚性梁,1、2两杆的材料相同,长度如图所示,横截面面积分别为A 1 和A 2 。若在载荷P作用下,使AB横梁平行下移,则两杆横截面面积为( )。
A.
2A 1 = A 2
B.
A 1 =2A 2
C.
A 1 = 4A 2
D.
3A 1 = A 2
【单选题】听力原文：W: In Judy's case, why is she discharged? M: Because as a general rule, a bill of exchange must be duly presented for payment. Judy must have failed to observe the very strict rules about it. Q: ...
A.
Because she lost her bill.
B.
Because her bill didn't mature.
C.
Because she forgot the rules.
D.
Because her bill was not duly presented.
【单选题】听力原文：M: How do Jane and Bill like their new home? W: It's really comfortable, but they're tired of having to hear the jets go over their house at all hours. Q: What is located close to Jane and Bill's...
A.
A train station.
B.
An airport.
C.
A bus station.
D.
A super highway.
【单选题】患者男性,66 岁。胸痛 2 小时,诊断为急性心肌梗
A.
给予急诊溶栓治疗，下列对直接诊断冠脉再通最有价值的是（ ）
B.
胸痛 2 小时内基本消失
C.
出现心律不齐
D.
心电图抬高 ST 段回降>50%
E.
血清心肌酶峰值提前
F.
冠脉造影示闭塞动脉再通
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