处在安静状态下动物的射血分数一般为()
A.20%
B.40%
C.60%
D.80%
E.不足30%
参考答案:C
Mr. Smith ________ his pupils how to prepare for the test since 8 am, but no one listens to him.
A.has told
B.is telling
C.has been telling
D.will have told
客户(产品)营销部门为()。
A、授信调查机构
B、授信审查机构
C、授信审议机构
D、授信执行机构