培养幼儿良好的呼吸卫生习惯,首先要培养他们用鼻(),预防上呼吸道感染。
参考答案:呼吸
There are four seasons in the year. And autumn_______ after summer.
A.will come
B.come
C.is coming
D.comes
当呼吸肌完全松弛时,肺容量等于
A.肺活量B.余气量C.补呼气量D.机能余气量E.深吸气量