Activty和Task的启动模式有哪些？（）A、standard、singleTopB、singleTop、singleTaskC、singleTask、singleInstanceD、standard、singleTop、singleTask、singleInstance

143 For a given characteristic in a construction process, the standard deviation associated with production variation is 0.8", and the standard deviation associated with measurement variation is 0.6". The total standard deviation for this characteristic is:

A. 1.4"

B. 1.2".

C. 1.0"

D. 0.8"

E. 0.2"

A.standard、singleTop

B.singleTop、singleTask

C.singleTask、singleInstance

D.standard、singleTop、singleTask、singleInstance

Using the problem stated in the Special window, Calculate the deviation of duration for the task, using the PERT concept of standard deviation of task duration.

A . 0.5

B . 1

C . 1.8

D . 2.2

E . 2.8

"Insufficiency of manning or insufficiency of certification of seafarers" is an identification of a

A.substandard ship

B.standard ship

C.over-standard ship

D.reference ship

123 Using the problem stated in the Special window, Calculate the deviation of duration for the task, using the PERT concept of standard deviation of task duration.

A. 0.5

B. 1.0

C. 1.8

D. 2.2

E. 2.8

针对Apache服务器性能优化，一般有两种模式，分别是()。

A.httpd模式

B.prefork模式

C.worker模式

D.standard模式

For a given characteristic in a construction process, the standard deviation associated with production variation is 0.8", and the standard deviation associated with measurement variation is 0.6". The total standard deviation for this characteristic is:

A . 1.4"

B . 1.2".

C . 1.0"

D . 0.8"

E . 0.2"

注册一个自定义组件语句的用法是：（ ）

A.RegisterComponents(TMyComponent,[‘Standard’])

B.Register(TMyComponent,[‘Standard’])

C.RegisterComponents(‘Standard’,[TMyComponent])

D.Register(‘Standard’,TMyComponent)