【单选题】A TIME SERIES forecasting model in which the forecast for the next period is the actual value for the current period is the
D.
exponential smoothing model.
E.
weighted moving average.
【单选题】PCR过程一般经历下述三十多次循环:95℃下使模板DNA变性、解链→55℃下复性(引物与DNA模板链结合)→72℃下引物链延伸(形成新的脱氧核苷酸链)。下列有关PCR过程的叙述中不正确的是:()
A.
变性过程中破坏的是DNA分子内碱基对之间的氢键,也可利用解旋酶实现
B.
复性过程中引物与DNA模板链的结合是依靠碱基互补配对原则完成
C.
延伸过程中需要DNA聚合酶、ATP、四种核糖核苷酸
D.
PCR与细胞内DNA复制相比所需要酶的最适温度较高
【简答题】核酸分子中糖环与碱基之间形成_________键,核苷与核苷之间通过_________键连接成多聚体。
【简答题】But for visitors,the airport is the actual gateway where entry procedures are done. B)除非是游客,机场才是执行进入程序的实际的大门。 C)但对旅游者来说,入境手续只能在机场这个真正的入口办理。 D)机场对于游客来说才是办理入境手续的入口。
【单选题】PCR是一种体外迅速扩增 DNA 片段的技术。PCR 过程一般经历下述三十多次循环:95℃下使模板 DNA 变性、解链→55℃下复性(引物与 DNA 模板链结合)→72℃下引物链延伸(形成新的脱氧核苷酸链)。下列有关 PCR 过程的叙述中不正确的是:( )
A.
变性过程中破坏的是 DNA 分子内碱基对之间的氢键,也可利用解旋酶实现
B.
复性过程中引物与 DNA 模板链的结合是依靠碱基互补配对原则完成
C.
延伸过程中需要 DNA 聚合酶、 ATP 、四种核糖核苷酸
D.
PCR 与细胞内 DNA 复制相比所需要酶的最适温度较高
【单选题】What is the actual meaning of the phrase 'Exit Area' by the nurse?
A.
A place where to wait for transferring to a good hospital.
B.
A place where to wait for bidding a final good bye to the world.
C.
A place where to be treated by experienced doctors.
D.
A place where to wait for checking out and going home.
【单选题】What is the actual reason the man lives in ISA?
A.
It costs less than living in the dorm.
B.
It doesn't take a lot of time to take care of the house and cook meals.
C.
He really has a lot of fun living there with friends.
D.
He thinks it's a great experience living with people worldwide.
【单选题】What is the actual cause of cold symptoms?
B.
The body's immune response.
C.
Mixed use of certain drugs.
【简答题】But for visitors,the airport is the actual gateway where entry procedures are done? A.但对于游客说来,机场才是真正的入境通道,入境手续需要在这里办理。 B.除非是游客,机场才是执行进入程序的实际的大门。 C.但对旅游者来说,入境手续只能在机场这个真正的入口办理。 D.机场对于游客来说才是办理入境手续的入口。