糖酵解中催化不可逆反应的酶有（）
A.葡萄糖-6-磷酸酶
B.磷酸烯醇式丙酮酸羧激酶
C.异柠檬酸脱氢酶
D.苹果酸脱氢酶
E.己糖激酶
参考答案：E
The manager was absent because of illness； ______，the meeting was put off until tomorrow.
A．as a result
B．what's worse
C．in other words
D．by the way
长期取向
