根据价格细目表，判断下列句子是否正确，正确的写（T），错误的写（F）。

( )1. The menu is for a restaurant.                                                       

( )2. There are four kinds of hamburgers for you to choose.                               

( )3. You can't get soup here.                                                           

( )4. You can't  have a beef hamburger, a cup of coke and fried rice if you have ten yuan.

哪种类型的约束只能在列一级定义

A．CHECK
B．UNIQUE
C．NOT NULL
D．PRIMARY KEY
E．FOREIGN KEY