下列能够设定外键约束的关键词是( ) A: PRIMARY KEY B: FOREIGN KEY... REFERENCE C: CHECK D: UNIQUE

According to the main area of pixels in the histogram, the tone can be divided into A: Low key, high key, middle key B: Hard tone, soft tone C: Long key, short key D: Long key, middle key, short key

HashMap中的put()方法参数是() A: put(value,key) B: put(key,key) C: put(key,value) D: put(key,key)

关键码key实际存放的位置是： A: key B: key - 1 C: hash(key) D: hash(hash(key))

What types of lighting are used in the following images: LOW KEY and HIGH KEY? 5.55 Low Key or High Key Lighting?

下列表达正确的是（ ）。 A: if（key=0）‍ B: if（key==0） C: for(key=0) D: while(key=0);

在JSON字符串中，Object结构是（ ）。 A: key , value B: {key:value,key:value...} C: Key D: value

The principle of uniformitarianism indicates that ______. A: the past is the "key" to the future B: tomorrow is the "key" to the past C: the present is the "key" to the past D: the past is the "key" to the present

The mark of a common flat key is: KEY 12x80 GB 1096-2003, the type of this key is ( ) A: Round head common flat key B: Square head common key C: Half round head common flat key D: Other flat keys

Master key, secondary key and primary key are all can be used to encrypt file or communication.