以下关于ATM网络的叙述，不合适的是______。
ATM网络是宽带化的传输网络，可提供各种宽带化的业务服务
B. ATM网络有高速的数据传输能力，可提供良好的服务质量QoS
C. ATM网络的吞吐量与传统网络差不多
D. ATM可动态地分配带宽，适合传输突发性数据
Parents are too likely to blame schools for the educational ______ of their children.
A. boundaries
B. confinements
C. restraints
D. limitations
I am afraid I can’t go. I have to do some (clean) ______ at home.
Though the long-term（）cannot be predicted, the project has been approved by the committee.
A. affect
B. effort
C. effect
D. afford
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