57.cat file1 file2 file3 > fileall 是将三个小文件合并成一个文件。
57.cat file1 file2 file3 > fileall 是将三个小文件合并成一个文件。
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();
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();
费用支出最高的企业是()。 A: 57 B: 57 C: 57 D: 57
费用支出最高的企业是()。 A: 57 B: 57 C: 57 D: 57
5 Didn't you see that'blue cat/blue'cat? A: 'blue cat B: blue'cat
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();
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
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
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
'lazy cat'.match(/[cat]/g)与'lazy cat'.match(/(cat)/g)的匹配结果是一样的
l don’t know () now. A: where is my cat B: my cat is where C: where my cat is D: where my cat
l don’t know () now. A: where is my cat B: my cat is where C: where my cat is D: where my cat
_______ and caught the mouse. A: A. Up the cat jumped B: B. The cat up jumped C: C. Up jumped the cat D: D. Jumped up the cat
_______ and caught the mouse. A: A. Up the cat jumped B: B. The cat up jumped C: C. Up jumped the cat D: D. Jumped up the cat