The new safety problem of contaminated（受污染的）milk is much more widespread，           at least 22 dairy companies and their milk products that have appeared nationwide.

A．to involve

B．involved

C．involving

D．being involved

马克思主义哲学中国化的精髓是

A．《实践论》

B．《矛盾论》

C．科学技术是第一生产力

D．解放思想，实事求是、与时俱进