Foam is a very effective smothering agent and（）.

A.it provides cooling as a secondary effect

B.works well on extinguishing electrical fires

C.can be used to combat combustible metal fires

D.All of the above

右侧小脑幕切迹疝的典型临床表现是

A．昏迷、右侧瞳孔散大，左侧肢体瘫痪

B．昏迷、右侧瞳孔散大，右侧肢体瘫痪

C．昏迷、双侧瞳孔散大，右侧肢体瘫痪

D．昏迷、左侧瞳孔散大，左侧肢体瘫痪

E．昏迷、左侧瞳孔散大，右侧肢体瘫痪