【判断题】竞技健美操既有规定比赛项目,也有特定的竞赛规则和评分方法,还有比赛形式和内容的特殊要求。
【单选题】Critics of Wallerstein's study ______.
A.
think the number of families studied was too small
B.
think that all the factors were considered
C.
think that divorce is not painful
D.
think that healthy families do not have problems
【判断题】目前计算机病毒的传播途径主要是计算机网络。
【单选题】目前因特网上计算机病毒传播的主要途径是( )。
【判断题】尘螨是一类极强的变应原,可通过皮肤接触进入人体,因反复接触而致敏。