目前,我国作为城市电源的发电厂以火力发电厂和( )为主,并正在发展核电厂。
A.风力发电厂 B.水力发电厂C.火力发电厂 D.太阳能发电厂
参考答案:B
粪便感官检查具有一定的诊断意义,一般给家兔做粪便检查时应安排在()
A.中午
B.傍晚
C.深夜
D.早晨
E.任何时间
It will cost $ 20000 a year for four years when an 8 - year old child is ready for college. How much should be invested today if the child will make the first of four annual withdrawals 10 - years from today The expected rate of return is 8 percent.()
A. $ 30683.
B. $ 66243.
C. $ 33138.