流行性乙型脑炎主要累及（）。
A.中枢神经系统灰质
B.中枢神经系统白质
C.不是中枢神经系统
D.脊髓脑段
E.脊髓腰段
参考答案：A
诊断有机磷中毒最重要的指标是
A．确切的接触史
B．呕吐物和衣服有大蒜味
C．血胆碱酯酶活性降低
D．阿托品试验诊断阳性
E．出现毒蕈碱和烟碱样症状
Now everyone is concerned about how to conquer the economic crisis（）is very important for us to be able to preserve our standard of living.
A. which success
B. its success
C. the success of which
D. the success of it
