复合溃疡是指同时有（）
A.胃大、小弯溃疡
B.胃体、胃窦溃疡
C.胃小弯与幽门管溃疡
D.胃与十二指肠溃疡
E.胃底与胃小弯溃疡
参考答案：D
_______ has been announced, our government will take more measures to make the falling economics recover as soon as possible.
A That B As C It D What
山东电网的频率标准是（）赫兹，频率偏差不得超过正负（）赫兹。
