水稻在开花期间在38℃的恒温条件下几乎不结实，这是由于______使受精过程受到严重伤害的结果。
参考答案：高温
A．(A) No one in this office is willing to do the translation except yourself.
B．(B) The new secretary will ask someone to fix the date for you.
C．(C) The new secretary can type and hand in the document for you.
D．(D) The secretary is an able person to help you with the translation.
旋光汁的检定，《中华人民共和国药典》规定用( )。
A．水B．标准石英旋光管C．真空热电偶D．旋光管E．液体石蜡
