如图7-70所示电路，Q1、Q2原始状态为11，当输入两个脉冲后的新状态为（）。
A.00
B.01
C.11
D.10
参考答案：A
---It is said that China has been a member of WTO since December 11, 2001.
---Well, it’s wonderful that the Chinese people ______ have made so much progress these years.
A．must
B．can
C．should
D．may
一般来说，外贸乘数要大于投资乘数。（）
