It was foolish of him to _______his note during that important test, and as a result, he got punished.

A．stick to

B．point to

C．refer to

D．keep to

关于吹塑机模具的安全保护功能，不正确的说法是（）

A、可以保护模具，避免其受到损坏

B、靠合模安全开关来控制

C、一旦模具内有异物，合模过程马上自动终止

D、若模具有异物，只要合模开关灯亮，模具仍将工作