所谓修身在正其心者，身有所（）则不得其正，有所恐惧则不得其正，有所好乐则不得其正，有所忧患则不得其正。
A.奋第
B.奋弃
C.忿惕
D.负第
参考答案：C
The calculations, had they been done by hand, ______all practical value by the time they were finished.
A．had lost
B．would lose
C．should have lost
D．would have lost
当管道雷诺数Re（）2300时，可判断液体流动的状态是紊流状态。
A、大于
B、小于
C、等于
D、小于等于
