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【单选题】
设有关系Students（学号，姓名，年龄，性别，系名，家庭住址），其中，属性“系名”是关系DEPT的主键，关系Students的主键和外键分别是 （59） 。A.
学号、家庭地址
B.
姓名、家庭住址
C.
学号、系名
D.
姓名、系名
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举一反三
【单选题】The writer of this passage would probably favor ______.
A.
bus drivers who weren't reckless
B.
driving alone
C.
a television set on the bus
D.
no billboards along the road
【简答题】人教版九年级下册物理配套练习册第二十一章第3节广播、电视和移动通信答案
【单选题】The sentence 'Newton would not take no for an answer' probably means _____.
A.
Newton didn't understand why Flamsteed did so
B.
Newton cared little about what Flamsteed did
C.
Newton could do nothing without the information
D.
Newton would not accept the refusal of Flamsteed
【单选题】The writer of this passage would probably be in favor of______.
A.
bus drivers who weren't reckless
B.
driving alone
C.
a television set on the bus
D.
no billboards along the road
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