在双代号标时网络中，工作i--j的总时差可以根据i、j节点的时间参数和i—j工作持续时间D＜下标＞ij算得。在下列计算公式中，正确的是()。
A. TFij＝LTi-ETi+ Dij
B. TFij＝LTj-LTi-Dij
C. TFij＝ETj-ETi+Dij
D. TFij＝LTj-ETi-Dij
Which of the following is strongly against cloning research？
A. The National Institutes of Health.
B. The federal government.
C. The supreme court.
D. Congress's office of Technology Assessment.
The example in Egypt and Italy shows that
A. surviving material culture is easy to understand.
B. museums am not capable of preserving so many items.
C. archaeology is not a high priority in both countries.
D. further excavation might be unnecessary.
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