课时作业22
ⅰ.阅读理解
a
(2013•江苏卷)if a diver surfaces too quickly,he may suffer the bends.nitrogen (氮)dissolved(溶解)in his blood is suddenly liberated by the reduction of pressure.the consequence,if the bubbles(气泡)accumulate in a joint,is sharp pain and a bent body—thus the name.if the bubbles form in his lungs or his brain,the consequence