单选题
英语四级
2017-05-17
When the shark swims slowly, the fibers are relaxed and pressure of them is low.
参考答案
J
答案解析
信息明示题。题干：当鲨鱼缓慢游动时，纤维是放松的并且纤维内的压力是低的。题干关键词是shark swims slowly和fibers are relaxed。J段提到When the shark swims slowly，the pressure on the fibers is relatively low．The fibers ale more relaxed．与题干吻合，故选J。