胸廓的弹性回缩力成为吸气的弹性阻力见于()
A.深吸气
B.深呼气
C.平静呼气末
D.胸廓处于自然位置时
E.发生气胸时
参考答案:A
Change the forms of the following sentences. 句型转换。
1. It's 7:00. (对画线部分提问)
2. Good morning. (作出回答)
3. It's time to have lunch. (同义句转化)
4. Spring Festival is in January or February. (对画线部分提问)
5. It was Sunday, July eleventh yesterday. (对画线部分提问)
[程序](3分)#include int f(int &n,int &m){ static int k=10; n+=m; k+=n; m+=k; cout<<"k="<