9. All people around the world should ____________ the common task of building a community with a shared future for humanity.
A. take up
B. share in
C. embark on
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10. Rather than trying to negotiate treaties that outlaw such behavior, America should ____________.
A. lead by example
B. let oneself go
C. strike it rich暴富
11. Wenchuan was _________ a massive earthquake on May 12, 2008. After that, many people volunteered to donate money and other necessary things.
A. constrained to
B. stricken by
C. harassed by
计数器也可以作为使用。
A. 存储器
B. 分频器
C. 加法器
D. 寄存器
74LS194是由4个触发器组成的功能很强的4位移位寄存器。
A. 8位移位寄存器
B. 4位移位寄存器
C. 8位同步计数器
D. 4 位同步计数器