用心肺复苏法进行抢救要坚持不断地进行，在医务人员未接替救治前，不应（）现场抢救
A、间断
B、勉强
C、放弃
参考答案：C
没有水，就没有生机勃勃的地球。小华与同学们为了探究水的组成，量取了72g水，用右图所示电解水的装置进行实验，通电后两电极都有气体放出。请帮他们先在理论上推测一下，正极、负极分别会收集到什么气体，最多各是多少克？
He noticed that Joan was studying him closely, but her expression gave away nothing of what she was thinking.
A．revealed
B．disposed
C．reminded
D．distributed
