The professionals, according to the text, have made a mistake in
A.leaving the warning system imperfect for years.
B.delaying the deployment of a new generation of detectors.
C.insisting Tsunamis' potential damage to the public infrastructure.
D.ignoring of Tsunamis' destructive force to human life.
第1题
A、零件修复后必须保证具有足够的强度和刚度
B、零件修复原须保证具有原来的使用寿命
C、修复工艺必须能够充分满足零件的修复要求
D、修复费用应低于新件制造成本或购买新件的费用
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