题目内容
（请给出正确答案）
A.事件取样
B.情境取样
C.便捷取样
D.时间取样
参考答案
简答题官方参考答案
（由简答题聘请的专业题库老师提供的解答）
网友提供的答案
更多“每天在10：am～12：am期间观察行为两小时，连续观察一周，这属于观察法对行为取样中的（）.”相关的问题
{
int t,h,m;
scanf("%d",＆t);
h=(t/100)%12;
if(h==0)h=12;
printf("%d:",h);
m=t%100;
if(m＜10)printf("0");
printf("%d",m);
if(t＜1200||t===2400)
printf("AM");
else printf("PM");
}
若运行时输入：1605＜回车＞，则程序的运行结果为______。
【填空题】请阅读以下程序，若运行时输入:1605＜cr＞时，程序的运行结果是 。 main() {int t,h,m; scanf("%d",&t); h=t/100%12; if(h==0) h=12; printf("%d:",h); m=t%100; if(m＜10) printf("0"); printf("%d",m); if printf("am"); else printf("pm");＞
听力原文：M: Hello, can I help you？
W: Yes, please! I like this sweater very much. But it's too small for me. Do you have it in size 12？
M: I am afraid not. Size 10 is the largest we have.
What size does the woman want？
A．Size 8.
B．Size 12.
C．Size 11.
D．Size 10.
Summary of the Text To my son, I am a (1)_____________: a father he is (2)__________ listen to and a man (3)____________ the rules of grammar. And I got (4)______________ this because my student was unable to describe properly her feeling on her (5)__________ to Europe. However, it doesn't (6)________________ to criticize our students. They unfairly bear the bulk of the criticism for these (7)__________________ because there is a sense that they (8)_________________. On one hand, they are misled by the (9)____________. On the other hand, school fails to (10)_________________ the essential framework of language, (11)_____________grammar and proper vocabulary. Perhaps, language should be looked upon as a (12)_________ and a (13)___________________: often study the road map (check grammar) and (14)________ the car engine (adjust vocabulary). Learning grammar and a good vocabulary is just like driving with a road map in a (15)________________ car. (16)__________, (17)_________, and (18)__________ communication depends upon grammar and a good vocabulary, the two (19)__________ assets for students, but they are (20)_______________ in schools.
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