列哪些物质可作为乳化剂使用（）。
A、表面活性剂
B、明胶
C、固体微粒
D、阿拉伯胶
E、乙基纤维素
参考答案：A, B, C, D
根据句意及首字母提示完成下列句子
1. The animal w about 200 pounds.
2. The nose of the elephant is about two meters l .
3. It's dangerous for animals to drink if the water becomes p______．
4. The monkey is p .Lots of the visitors like it.
5. Pandas are e animals. We must protect them.
偏盲性视野缺损最常见于（）。
A.糖尿病性视盘水肿
B.Graves病浸润性突眼
C.嗜铬细胞瘤阵发高血压眼底出血
D.垂体腺癌鞍上发展
E.希恩（Sheehan）综合征垂体梗死
