题目内容

下列标识符哪些是合法的。（）

A. $time
B. _date
C. 8sum
D. mux

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在以下定义的标识符中，选择定义正确的一个标识符。（）

A. 34net
B. a1-b1
C. a3_$_2
D. a*b_net

下列标识符中，_________是合法的标识符。()

A. Shift$0
B. 34net
C. wire
D. Not@Ack_0

Listen to the dialoge and select the best choices.The relationship between the two speakers is probably________.

A. teacher and student
B. seller and customer
C. old friends
D. old classmates

Lin Da met Prof. Green_______.

A. by chance
B. as arranged
C. in a shop
D. at the wedding ceremony