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【单选题】
板块构造学说是20世纪最重要的科学成果之一，下图为某种类型的板块边界示意图。完成下列各题。 {TS}图示的板块边界是（ ）。A.
大陆板块与大陆板块的碰撞边界
B.
大洋板块内部的生长边界
C.
大洋板块向大陆板块的俯冲边界
D.
大陆板块内部的生长边界
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】下列各项中,应缴纳印花税的是( )。
A.
报刊发行单位和订阅单位之间书立的凭证
B.
建筑安装工程承包合同
C.
门市部零星修理业务开具的修理单
D.
银行同业拆借合同
【判断题】A pulse-triggered flip-flop is identified by a bubble on its Q output terminal.
A.
正确
B.
错误
【单选题】For an edge-triggered D flip-flop,对边沿触发的D触发器，
A.
a change in the state of the flip-flop can occur only at a clock pulse . 触发器状态的改变仅在时钟脉冲处发生。
B.
The state that the flip-flop goes to depends on the D input . 触发器的状态如何转换由D输入端决定。
C.
The output follows the D input at each clock pulse . 每个时钟脉冲处，输出都跟随输入D变化。
D.
All of these answers . 所有答案都对。
【单选题】(Single choice)For an edge-triggered D flip-flop,
A.
a change in the state of the flip-flop can occur only at a clock pulse edge
B.
the state that the flip-flop goes to depends on the D input
C.
the output follows the input at each clock pulse
D.
all of these answers
【单选题】Pulse-triggered flip-flops are also called ________ flip-flops.
A.
level
B.
postponed
C.
edge
D.
master-slave
【单选题】Which of the following best describes the action of pulse-triggered flip-flops?
A.
A pulse on the clock transfers data from input to output.
B.
The synchronous inputs must be pulsed.
C.
The data is entered on the leading edge of the clock, and transferred out on the trailing edge of the clock.
D.
The clock and R-S inputs must be pulse shaped.
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