不规则需求往往给企业生产经营带来很多不便，所以我们应通过各种方式调节需求，使其尽量规则化。
参考答案：对
The most obvious reason why computer-based testing is becoming increasingly popular is that it makes tests easier ______.
A．take
B．taking
C．to take
D．taken
207+326+197+191的值为( )。
A．919
B．921
C．923
D．925
