南方梨区常用的主要树形有疏散分层形和多主枝开心形两种,疏散分层形近似梨自然生长状态,通风透光良好,内膛枝不致早枯,结果容积较多,树冠结构紧凑,抗风力较强。
参考答案:错
She was so ________ in her job that she didn’t hear anybody knocking at the door.
A.attracted
B.absorbed
C.drawn
D.focused
#include int f=1; int fac(int n) {f=f*n; return f; } main() {int i; for(i=1;i<=4,i++) {printf("%d!=%d\n",i,fac(i));} } 程序运行结果为: ______