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【多选题】
(多选题)在自然保护区的( )内,不得开展旅游和生产经营活动。A.
核心区
B.
保护区
C.
实验区
D.
示范区
E.
缓冲区
拍照语音搜题，微信中搜索"皮皮学"使用
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【简答题】什么是背对背 ?什么情况下需要进行背对背测试?
【简答题】对百级层流的保护可否用风帘？A级区下有人员操作的情况下如何进行有效控制？无菌区是否需要将A级区与B级背景有效隔开，以保证百级层流风向？（FL-1-9）
【多选题】Complete the following sentences with appropriate words given below (20%)(请填写相应的字母)
A.
fulfill
B.
desirable
C.
grab
D.
obstacle
E.
tragedy
F.
passive
G.
spoil
H.
honorable
I.
chase
J.
passion 1. It's important not to let mistakes your life. 2.Both sides consider it to further the understanding between the two peoples. 3. The English have a for gardens. 4. They have made contributions to their nation. 5. They have to certain criteria; they have to be positive and uplifting. 6. You will not get the chance to win if you remain . 7.When dogs used to do this when they saw elephants, the elephants would get annoyed and them. 8. He wants to everything, can't give up a single thing. 9.The huge tree that had been blown down by the storm was an to traffic. 10. All that money brought nothing but sadness and misery and .
【简答题】通常情况下,如果要的对在均匀背景下拍摄的镜头进行抠像,可以只对一帧画面进行抠像,不需要制作关键帧,这一帧尽量选取镜头中 的帧,如果拍摄时灯光或背景有变化,在抠像中也可以用关键帧,但是在设置关键帧时需要注意,必须在同一种光效下使用 抠像效果,即在开始和结束的位置均设置关键帧。
【简答题】当助滤剂的粒度一定时,过滤速率与澄清度成( ),过滤速率大,澄清度( );过滤速率小,则澄清度( )。
【单选题】Many people are misled by astrology because it is presented by the practitioners as _____.
A.
a theory that can describe natural phenomena
B.
a magical key to understanding themselves
C.
an ancient belief that had long been applied to monarchs
D.
a mysterious power beyond the explanation of science
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