Python语言正确的标识符是 A: 2you B: my-name C: _item D: abc*234

开启第二条生产线的标准（） A: 早餐ITEM数≥280/午餐ITEM≥241 B: 早餐ITEM数≥281/午餐ITEM≥240 C: 早餐ITEM数≥241/午餐ITEM≥280 D: 早餐ITEM数≥200/午餐ITEM≥180

在以下的变量命名中，存在错误的是（） A: %isOpen B: %item_234 C: $the_result D: $true

The opportunity cost of an item is ( ). A: the price of that item B: what you give up to get that item C: the time you have to spend on earning enough money to buy that item D: the cost of producing that item

A credit item is an item for which a country must pay. ( )

What is true about the point-to-point comparison? A: We move back and forth between Item A and Item B at each point. B: We should discuss items in the same order throughout the essay. C: Shifting between Item A and Item B makes the comparison easy to follow. D: It fully discusses Item A at first and then turns to Item B. E: It presents all the information about Item A and then all that about Item B.

If an item is _________ the shopping cart, chances are your item is sold out.

“gac（234

The most effective complaint can be made by ________. A: showing the faulty item to the manufacturer B: explaining exactly what is wrong with the item C: saying firmly that the item is of poor quality D: asking politely to change the item

3. What is true about the point-to-point comparison? A: We move back and forth between Item A and Item B at each point B: We should discuss items in the same order throughout the essay C: It presents all the information about Item A and then all that about Item B D: Shifting between Item A and Item B makes the comparison easy to follow