对人体没有免疫原性的物质是()
A.自身移植的皮肤
B.异体移植的皮肤
C.自身释放的晶状体蛋白
D.动物的免疫血清
E.异种血型的红细胞
参考答案:A
Her brother _____ be at home now, because he was seen playing basketball in the stadium just now. [ ]
A. mustn't
B. needn't
C. can't
D. shouldn't
对于个人而言,利率水平的变动会影响()。
A.对存款收益的预期
B.消费支出和投资决策的意愿
C.从银行获取的各种信贷的融资成本
D.现在贷款买房还是将来攒够钱买房的决策
E.购买股票还是购买债券的决定