反射弧不包括
A.感受器
B.传入神经
C.中枢神经
D.外周神经
E.效应器
参考答案:D
Jumping out of ________ airplane at ten thousand feet is quite ________ exciting experience.
A.an; /
B./; an
C.an; an
D.the; an
在t℃时,取140g氯化钾饱和溶液,将其蒸发10g水,再冷却到t℃时,剩余溶液的质量为126g,则原饱和溶液中所含溶质的质量是( )
A.40g
B.36g
C.4g
D.56g