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【简答题】
条件表达式 a?b:c ,其中 a,b,c 是 3 个运算分量。当运算分量 a 的值为真,则表达式的值为 ,否则表达式的值为 。
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【单选题】I‘ve got his name on the tip of my__________ ．A.headB.earC.tongue
A.
I‘ve got his name on the tip of my__________ ． A.head
B.
ear
C.
tongue
D.
teeth
【单选题】A native American may feel in doubt about how to tip when he is in a new place because the tipping custom ______.
A.
varies for personal services
B.
varies from place to place in the US
C.
is consistent only in large towns in the US
D.
is consistent only in small towns in the US
【单选题】He was smoking; I could see the tip of his cigarette ______ in the darkness.
A.
sparkling
B.
gleaming
C.
shining
D.
glowing
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