在为老人作听力检查时应()
A.先用耳塞塞住听力较差侧耳朵
B.测试者面对老人的眼睛
C.测试者声音由弱至强
D.距离老人一米左右
E.小声发出两音节的数字
参考答案:E
The old professor told us every part of the materials should be made use of ______ the power station.
A.to build
B.building
C.build
D.built
导纳