.有机磷农药中毒的机理是：
A．抑制琥珀酸脱氢酶
B．抑制已糖激酶
C．抑制胆碱脂酶
D．抑制柠檬酸合成酶
E．抑制异柠檬酸脱氢酶
参考答案：C
The poster says that a writer and poet ___ to give us a talk on English next week.
A．is
B．are
C．be
D．will be
刃磨硬质合金刀具用那种砂轮？
