皮皮学，免费搜题
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【单选题】
在关系A(S，SN，D)和关系B(D，CN，NM)中，A的主关键字是s，B的主关键字是D，则关系A的外码是（ ）。A.
CN
B.
SN
C.
S
D.
D
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】It took me a long time before I was able to fully appreciate what they __ for me.
A.
had done
B.
did
C.
would do
D.
were doing
【简答题】编写函数,接收两个作为参数,返回一个元组,其中第一个元素为最大公约数,第二个元素为最小公倍数。
【单选题】听力原文：Hello, I'm Janet Hill, Senior Chef with Wonderfoods. We believe that while good food is an important part of our lives, making it should not be tiresome. At today's demonstration, I will show you...
A.
Students.
B.
Viewers.
C.
Suppliers.
D.
Investors.
【单选题】我让厨师马上准备您(点的)菜。
A.
I will ask the chef for prepare your dish right now.
B.
I will ask the chef for prepare you dish right now.
C.
I will asks the chef for prepare your dish right now.
D.
I will ask the chef to prepare your dish right now.
【多选题】串接文本是指将文本从一个对象串接到下一个对象,文本之间保持链接关系。只有_____________和____________可以创建串接文本。
A.
点文本
B.
区域文本
C.
路径文本
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