下列情况中与真菌的作用无关的是[ ]
A．制作馒头和面
B．酿造酱油和红酒
C．保障生物圈中二氧化碳的循环
D．制造酸奶和泡菜
答案：D
以直线x=-2为准线的抛物线的标准方程是______．
The girl's face looked pale, so our classroom teacher requested that she _____ to hospital immediately. [ ]
A. send
B. be sent
C. sending
D. should send
