第17题: [单项选择]Even in a highly modernized country, manual work is still needed. A. physical B. mental C. natural D. hard 参考答案:A 答案解析:manual做名词时意为:手册,指南,在这个句子中做形容词,意思是:手工的,体力的,与physical意思相近,A为正确答案。mental.意为:精神的,智力的;natural意为:自然的,它的名词形
第26题: [单项选择]When the boiler load returns to normal, the drum pressure will rise and steam bubble formation will reduce, causing a fall in water level This is known as (). A. swell B. shrinkage C. flash off D. lack of water 参考答案:B