干扰素诱生剂的抗肿瘤、抗病毒作用已被国际公认，它在萝卜中含量最高。
参考答案：对
He is, however, one of those restless people who never ___ content with their present environment.
A．have seemed
B．seemed
C．seems
D．seem
TCBS培养基的鉴别用糖是（）
A.葡萄糖
B.蔗糖
C.乳糖
D.半乳糖
E.麦芽糖
