When covering the Easongate incident, there was no mention of the tape that has been suppressed and that both CNN and Eason Jordan have declined to ask for it.

A．coveting

B．reporting on

C．discovering

D．resorting to

路易土气中毒是下列哪种酶活性受到抑制

A．二氢叶酸合成酶
B．胆碱酯酶
C．琥珀酸脱氢酶
D．巯基酶