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【简答题】
两个结构相同的关系R和S的( )是由数据R但不属于S的元组组成的集合。
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皮皮学刷刷变学霸
举一反三
【单选题】My father ____________ a car and ____________ a camera in the car. [ ]
A.
have; there is
B.
has; there is
C.
have; has
【单选题】My mother’s is getting grey ， butmy father has only a few grey ．
A.
． hairs ； hair
B.
． hair ： hair
C.
． hair ； hairs
D.
． hair ： hairs
【单选题】关于心脏叩诊的叙述,下列哪项是错误的:
A.
心脏叩诊可以确定心界,判断心脏大小、形状
B.
心脏被遮盖部分叩诊呈相对浊音
C.
心脏未被遮盖部分叩诊呈现绝对浊音
D.
一般要求叩诊出心脏绝对浊音界
E.
一般来讲，相对浊音界反应心脏实际大小
【判断题】The sentence “My father has deceased to join the heavenly choir.” is of the intimate style.()
A.
正确
B.
错误
【单选题】—Look! The old man must be your father. —No. He _ my father. My father has gone to Beijing to take the 60th birthday celebration of our country. [ ]
A.
must be
B.
must belong to
C.
can't be
【单选题】关于心脏叩诊的叙述,下列哪项是错误的 ?
A.
心脏叩诊可以确定心界，判断心脏大小 及 形状
B.
心脏被肺遮盖部分叩诊呈相对浊音
C.
心脏未被肺遮盖部分叩诊呈绝对浊音
D.
心绝对浊音界 反映 心脏的实际大小和形状
【单选题】— My father _____ Shanghai with my grandparents. — Really? _____ will they come back? [ ]
A.
has been to; How soon
B.
has gone to; How soon
C.
has been to; How long
D.
has gone to; How long
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