聚乙二醇属于
A.极性溶剂B.非极性溶剂C.半极性溶剂D.着色剂E.防腐剂
参考答案:C
移植排斥反应的类型不包括()
A.超急性排斥反应
B.加急性排斥反应
C.急性排斥反应
D.亚急性排斥反应
E.慢性排斥反应
His feature story opens and closes with descriptions of two new reports, each _____ one major point in contrast with the other.
A.makes
B.making
C.is to make
D.makes