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
参考答案:D
_____, 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
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