问题
单项选择题
What is the sea horse’s prehensile tail used for().
A. Propelling it through moving currents.
B. Grasping sea grass or coral to stabilize it.
C. Fending off attacks form predators.
D. Moving food to its mouth, like an elephant’s trunk.
答案
参考答案：B
解析：
[难点] 本题考查的是事实细节。另外对题干出现的关键词“prehensile tail”可能不熟悉。选项a并不符合题意。选项c和d在逻辑上说的过去，若考生没抓住准确细节的话很容易误选。