What type of epithelium forms the epidermis? A: Simple squamous epithelium B: stratified cuboidal epithelium C: stratified columnar epithelium D: Stratified squamous epithelium

位于口腔、食管和皮肤等处的上皮是(<br/>) A: stratified<br/>squamous epithelium B: stratified<br/>columnar epithelium C: pseudostratified<br/>ciliated columnar epithelium D: simple<br/>columnar epithelium E: transitional<br/>epithelium

According to the concept of social pyramid, American society is stratified into social classes based on the following standards except for________.

Which of the following is an example of nonprobabilistic sampling? A: Simple random sampling B: Stratified simple random sampling C: Cluster sampling D: Judgment sampling

Which of the following sampling methods does not lead to probability samples? A: stratified sampling B: cluster sampling C: systematic sampling D: convenience sampling

What type of tissue lines the esophagus? A: Simple squamous epithelium B: Simple cuboidal epithelium C: Simple columnar epithelium D: Stratified squamous epithelium

Which of the following is a method of probability sampling? A: Simple random sampling B: Systematic sampling C: Stratified sampling D: All of the above are methods of probability sampling.

What type of tissue lines the upper esophagus? A: Simple squamous epithelium B: Simple cuboidal epithelium C: Simple columnar epithelium D: Stratified squamous epithelium

Which are the common used ways to sampling? A: Simple random sample without replacement B: Simple random sample with replacement C: Stratified sample D: Cluster sample

Which of the following is not random sampling method ? () A: Simple random sampling B: Systematic<br/>sampling C: Nonprobability sampling D: Cluster sampling E: Stratified sampling