内径百分表使用完毕后，要把百分表和可换测头取下擦净，并在测头上涂防锈油，放入盒内保管。( )
参考答案：对
Mr Reed made up his mind to devote all he had to _______ some schools for poor children.
A．set up
B．setting up
C．have set up
D．having set up
流行性出血热病毒在（）条件下稳定。
A.4-20℃
B.4-25℃
C.5-20℃
D.5-25℃
