下面在sh_goods表中根据cat_id升序排序，当cat_id相同时按price降序排序的语句是（）。 A: SELECT * FROM sh_goods ORDER BY price DESC,cat_id; B: SELECT * FROM sh_goods ORDER BY price ,cat_id; C: SELECT * FROM sh_goods ORDER BY cat_id DESC,price; D: SELECT * FROM sh_goods ORDER BY cat_id,price DESC;

下面在sh_goods表中根据cat_id升序排序,并对每个cat_id按price降序排序的语句是( )。[br][/br](1.0) A: SELECT * FROM sh_goods ORDER BY price DESC,cat_id; B: SELECT * FROM sh_goods ORDER BY cat_id,price DESC; C: SELECT * FROM sh_goods ORDER BY price ,cat_id; D: SELECT * FROM sh_goods ORDER BY cat_id DESC,price;

下面在sh_goods表中根据cat_id升序排序,并对每个cat_id按price降序排序的语句是()。 A: SELECT*FROMsh_goodsORDERBYpriceDESC,cat_id; B: SELECT*FROMsh_goodsORDERBYprice,cat_id; C: SELECT*FROMsh_goodsORDERBYcat_id,priceDESC; D: SELECT*FROMsh_goodsORDERBYcat_idDESC,price;

下列哪个命令可以读取文件内容（） A: ls B: cat C: pwd D: id

若Animal是Cat,Dog的父类，则下列选项中，正确的是（） A: Animal animal = new Cat(); B: Animal a = new Cat(); Cat cat = (Cat) a; C: Animal animal = new Dog(); D: Cat cat = (Cat)new Dog();

5 Didn't you see that'blue cat/blue'cat? A: 'blue cat B: blue'cat

若Animal是Cat,Dog的父类，则下列选项中，正确的是（） A: Animal animal = new Cat(); B: Cat cat = (Cat)new Animal(); C: Animal animal = new Dog(); D: Cat cat = (Cat)new Dog();

cat testfile的输出与下面哪个命令相同？（） A: cat＞testfile B: cat＜testfile C: cat＞＞testfile D: cat＜＜testfile

Under the tree (). A: did a cat lay B: did lay a cat C: a cat lay D: lay a cat

'lazy cat'.match(/[cat]/g)与'lazy cat'.match(/(cat)/g)的匹配结果是一样的