5.在Arnold渲染选项卡中如果采样和光线深度（Sampling and Ray Depth）模块参数全部为0，物体失去了_____效果，看不出是什么效果材质，就像这样黑乎乎的一团

A、-1

B、0

C、1

D、100

"Virtual shops" may lack see-and-feel sampling, the phenomenal growth of catalogue shopping, TV-and-phone marketing and phone-banking in recent years is proof that see-and-feel is not the only way to sell.

A. While

B. If that

C. When

D. Which

"Virtual shops" may lack see-and-feel sampling, the phenomenal growth of catalogue shopping, TV-and-phone marketing and phone-banking in recent years is proof that see-and-feel is not the only way to sell.

A．While

B．If that

C．When

D．Which

1. With regard to the sampling, there were a limited number of students in the 15- to 18-year age range because fewer referrals of this age group were made to sleep centers and psychologists. There were a limited number of participants from the hospital samples who were diagnosed with ARC, DSPS, or RLS in this initial study, necessitating further validation studies with larger sample sizes. Furthermore, the recent changes in diagnostic criteria for OSAS and PLMD in children require further validation studies with larger sample sizes using these new hospital diagnostic criteria.

A、Revisiting previous sections or key results

B、Relating the study results to those of existing research

C、Specifying Achievements/Contributions & Implications

D、Identifying Limitations/ Suggesting Future work & Applications

“PPS sampling”指的是整群比例抽样。()

分层抽样 (stratified sampling)

随机抽(取)样(random sampling)

整群抽样(cluster sampling)

工作样本技术(work sampling technique)