测定室内空气中菌落总数时，仪器使用前，应按仪器说明书对仪器进行检验和标定。
参考答案：对
I clapped my hands happily _______ the pilot’s beautiful flight on the Air Show.
A．in admiration of
B．in memory of
C．in support of
D．in need of
停机时怎样投入盘车运行？
