离心鼓风机安装前，无垫铁安装法埋设的临时垫铁安装水平偏差不应大于0.20/1000，其标高允许偏差为±（）mm。
A、1
B、1.5
C、2
参考答案：C
通常药疗事故的等级分为几个级别
A．1级
B．3级
C．5级
D．7级
E．9级
Which of the following statements about Treasury Inflation Protected Securities (TIPS) is least accurate（）
A. Inflation adjustments are made semiannually.
B. The coupon rate on TIPS is effectively a real rate of interest.
C. The coupon rate adjusts upward for inflation.
