将下列句子改为同义句。

1. Ii Ming often goes to school by bus.

    Li Ming often                       bus to go to school.

2. A train is faster than a bus.

    A bus is                       a train.

3. Jenny goes to shijiazhuang in the afternoon.

    Jenny                         shijiazhuang in the afternoon.

4. My little brother is very young. He can't go to school.

    My little brother is             young             go to school.

5. Dalian is not near shijiazhuang.

    Dalian is                         shijiazhuang.

有机磷农药中毒出现毒蕈碱样症状的主要机制是（）

A.腺体分泌增加，平滑肌松弛

B.腺体分泌减退，平滑肌松弛

C.腺体分泌增加，平滑肌痉挛

D.腺体分泌减退，平滑肌痉挛

E.腺体分泌增加，运动神经兴奋