1978年实行改革开放政策以后，已和我国签订有关贸易关系的双边条

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问题单项选择题

1978年实行改革开放政策以后，已和我国签订有关贸易关系的双边条约、协定的国家或地区已达到( )

A．220多个

B．180多个

C．160多个

D．140多个

答案

参考答案：D

选择题

_____, he talks a lot about his favorite singers after class. [ ]

A. A quiet student as he may be

B. Quiet student as he may be

C. Be a quiet student as he may

D. Quiet as he may be a student

单项选择题

诊断急性中毒最有力的依据是

A．毒物接触史

B．临床表现

C．体格检查

D．诊断性治疗

E．既往病史