【单选题】Ben bakes bread and Shawna knits sweaters. Ben and Shawna both like to eat bread and wear sweaters. In which of the following cases is it impossible for both Ben and Shawna to benefit from trade?
A.
Ben cannot knit sweaters and Shawna cannot bake bread.
B.
Ben is better than Shawna at baking bread and Shawna is better than Ben at knitting sweaters.
C.
Ben is better than Shawna at baking bread and at knitting sweaters.
D.
Both Ben and Shawna can benefit from trade in all of the above cases.
【判断题】过程控制是指在人直接参加的情况下,利用控制装置使被控对象的过程输出量自动地接近给定值或保持在给定范围内的过程。
【单选题】Big Ben was named after
【单选题】请标明first name: Ben Brown A: Ben B: Brown
【简答题】阅读短文,判断下列句子正“T”,误“ F”。 Samuel: Hello, Ben, the necklace is very nice! Where did you buy it? Ben: My sister bought it for me in Chinatown. Samuel: Cool! Let's go there to do some shopping. Ben: But I d...
【简答题】Ben has to study for the English test.(改为否定句) Ben ______ ______ ______study for the English test.
【单选题】过程控制是利用控制装置使( )的过程输出量自动地接近过程给定值或保持在给定范围内的过程。