惊厥表现更为不典型者是
A.早产儿
B.新生儿
C.婴儿
D.幼儿
E.婴幼儿
参考答案:A
I could have arrived much earlier, but I ____ in the traffic.
A.would be caught
B.was caught
C.has been caught
D.had been caught
两个大小为3N和4N的力合成一个力时,此合力的最大值为()。
A、5N
B、7N
C、12N
D、16N