继发性主动转运中Na+的跨膜移动是（）
A．从高浓度一侧向低浓度一侧移动
B．从低浓度一侧向高浓度一侧移动
C．两者都是
D．两者都不是
参考答案：A
根据句意及首字母提示补全单词。
1. People can enjoy n_______ in the countryside. The air is fresher and the sky is bluer there.
2. She c_______ the table with a cloth yesterday.
3. In the o_______, there are all kinds of fishes.
4. She was full of j_______ because her parents love her.
5. Thousands of old trees were in the f_______ ten years ago, but now there are few.
