()率的计算公式是ψ=(S0-S1)/S0×100%。
参考答案:断面收缩
Thanks to _____ help from his teachers and classmates, he has made _______ rapid progress in his studies.
A.不填;a
B.the; 不填
C.the; a
D.a; the
请演示肺部的直接叩诊。