A client who has stress incontinence has been given a pamphlet that describes Kegel exercises. Which of the following statements indicates that the client has understood the instructions in the pamphlet

A．"It will probably take a year before the exercises are effective. "

B．"I should perform these exercises every evening. "

C．"I can do these exercises sitting up, lying down, or standing. "

D．"I need to tighten my abdominal muscles to do these exercises correctly. "

按照FIDIC合同条件，关于工程变更的计算，说法不正确的是（）。

A.变更工作在工程量表中有同种工作内容的单价或价格，应以该单价计算变更工程费用

B.工程量表中虽然有同类工作的单价或价格，但对具体变更工作而言已不适用，则应在原单价或价格的基础上制定合理的新单价或价格

C.工作的内容在工程量表中没有同类工作内容的单价或价格，应按照与合同单价水平一致的原则，确定新的单价或价格

D.变更工作的内容在工程量表中没有同类工作内容的单价或价格，由工程师确定新的单价或价格