非向流洁净室采用风量罩测试每一送风口风量时,每隔()秒读数一次,读数三次,结果取其平

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问题:

非向流洁净室采用风量罩测试每一送风口风量时,每隔()秒读数一次,读数三次,结果取其平均值。

A.10

B.15

C.25

D.20

考点:药物制剂工药物制剂工题库
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下列现象属于沧海桑田变化的是(  )

①喜马拉雅山发现海洋中化石

②在台湾海峡的底部发现了森林遗迹

③在南极地区发现了煤田

④地中海的面积不断缩小,最终将消失.

A.①②③

B.①②④

C.②③④

D.①②③④

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我国加快产业结构调整的主要举措是大力发展绿色经济、积极发展低碳经济 、积极发展循环经济、研发和推广气候友好技术。

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男性,57岁,胸骨后阵发性针刺样疼痛2年,近三个月咽下食物梗噎感而来诊。查体见右锁骨上淋巴结肿大。

治疗下列哪项不宜?()

A.抗癌药物治疗

B.抗癌药物治疗结合其他方法

C.中医中药治疗

D.手术治疗

E.单纯放射治疗

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请简述V3平台TFI单板的用途。

题型:单项选择题

The trip to the Mystery Caves will take place on Sunday, 27 July. You can book your tickets in Room 188 between 2:30 p.m. and 4:00 p.m. every day. Your parents should confirm (确认) the booking by writing to us as soon as possible. You should pay for the trip before 21 July. If we do not receive your money early enough, your booking will be cancelled(取消). If the trip does not take place for any reason, your money will be paid back.
We are planning to meet outside the railway station on Black Street at 8:00 a.m. It will take us about 2 hours to get to the center of the town by train, and from there we have to catch a bus. It will take another hour to get to the Mystery Caves on the bus.
We will spend about 1 hour and a half visiting the caves (山洞), and we hope to catch the 1:30 bus to Happy Lake for some swimming. If we are late, we will have to take the 3:00 bus straight back to Black Street.

How will they go to the Mystery Caves from the center of the town
[A] By ship.
[B] ay train.
[C] ay bus.

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