单项选择题

A．To encourage them.
B．To stop them immediately
C．To give some explanation.
D．To leave them alone.
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单项选择题
Since languages have to be designed to suit human weaknesses, it has to be designed for bad programmers.
A．Y
B．N
C．NG
单项选择题
Why does the author mention planktonburgers in (L. 3, Para. 4)
A．To describe the appearance of one type of plankton as a food source and then moves to a specific example.
B．To illustrate how much plankton a whale consumes.
C．To suggest plankton as a possible food source.
D．To compare the food values of heel and plankton.
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