题目内容

中国人民银行授权外汇交易中心根据国际外汇市场行隋每日公布外汇汇率( )。

A. 买入价
B. 中间价
C. 卖出价
D. 买入价、卖出价和中间价

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It will be safer to walk the streets because people will not need to carry large amounts of cash; virtually all financial ______ will be conducted by computer.

A. transaction
B. transmissions
C. transitions
D. transformation

He insisted on doing ______ good to others.

A. what he thought it was
B. what he thought was
C. what he was thought
D. what it was he thought

有关窦房结的描述，错误的是

A. 由神经细胞构成
B. 位于上腔静脉与右心房交界处的心外膜深面
C. 是心的正常心律的起搏点
D. 发出结间束至房室结
E. 血供多数来自于右冠状动脉

判断组织兴奋性的高低的常用指标是

A. 静息电位
B. 阈电传
C. 阈强度
D. 刺激强度的变化速度
E. 刺激的频率