如图所示，MN是竖直放置的长L=0.5m的平面镜，观察者在A处观察，有一小球从某

It is well known that ________ nature has provided Shangri-la (香格里拉) with endless natural treasures,

making the land ________ happy home for the local people. [ ]

A. the; 不填

B. the; a

C. 不填; a

D. a; a

有以下程序：
main()
int x[]=1,3,5,7,2,4,6,0),i,j,k;
for(i=0;i＜3;i++)
for(j=2;i＞=i;j--)
if( x[j+1]＞x[j]) k=x[j];x[j]=x[j+1];x[j+1]=k;
for(i=0;i＜3;i++)
for(j=4;j＜7-i;j++)
if(x[j]＞x[j+1]) k=x[j];x[j]=x[j+1];x[j+1]=k;
for(i=0;i＜8;i++) printf("%d",x[i]);
printf("\n");

程序运行后的输出结果是( )。

A) 75310246
B) 01234567
C) 76310462
D) 13570246

准统计感官

Questions 1 to 5 are based on the following conversation.

A. E-mail is very convenient.
B. E-mail messages make better keepsakes.
C. E-mail messages make a casual form of communication.
D. E-mail is great for just saying hello and checking up on people.

何种中药与苯唑西林、红霉素同服，可防止苯唑西林、红霉素被胃破坏，从而增强抗菌作用( )

A．麻黄
B．黄连
C．碱性中药
D．洋金花
E．大山楂丸