下图表示某植物相邻的3个细胞，其细胞液浓度依次为甲＞乙＞丙，正确表示他们之间水分子渗透方向的是（）
A.
B.
C.
D.
参考答案：C
棉花的种植到南宋后期扩展到[ ]
A、珠江流域
B、长江流域
C、黄河流域
D、淮河流域
根据句意，用括号内所给单词的适当形式填空。
1. She bought a ________(bath) suit last Sunday.
2. I like doing some ________(shop) at weekends.
3. She hasn’t ________(feed) the cat yet.
4. There are about ten ________(well) in that village.
5. Has the camera been________(pack) yet?
