I usually have some yogurt after meals as _______(助消化的) drinks.
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People began to _______(消费) biscuits when the sugar became cheaper.
The leader is the one who tell others to ______(执行).
Britian eat biscuits as _______(助消化的) biscuits.
摩尔强度理论是德国科学家摩尔提出来的关于材料失效破坏的强度理论,又称作为()。
A. 第五强度理论;
B. 修正的最大切应力理论;
C. 第六强度理论;
D. 修正的最大正应力理论。