单项选择题

正三角形、正五边形、正六边形都可以用等分圆周来作（）。
A、正确
B、错误

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单项选择题

高速脉冲输出Q0.1和Q0.0 时，控制字节地址：
A、相同
B、不同

多项选择题

Which of the following about gas lift valve is correct:

A．It’s a kind of a one-way valve inhibiting fluid backflow.
B．It plays as a channel for incoming fluid and gas.
C．A gas lift valve can decrease the kick off pressure.
D．Gas lift valves are divided into kick-off valves and working valves.