— Which would you like, rice or noodles?
— _______is OK. I'm hungry.
A:Either
B:Neither
C:Both
D:All
ride a bike
fly kites
sleep under a tree
read books
skip
sing a song
play football
Today is Sunday. The weather is fine. The children are playing in the park. Look. Sam and Leo are flying kites.
现有盐酸和CaCl2的混合溶液,向其中逐滴加入过量的某物质X,溶液的pH随滴入X的量的变化关系如图所示,则X可能是( )