We required that the machine parts ______ cast iron.

We required that the machine parts ______ cast iron. [w47] That's the new machine ______ parts are too small to b *67.That's the new machine ______ parts are too small to be 英语翻译All parts of the aluminum or die cast block that are sub cast-iron nerves是什么意思 It is required that the machine be oiled as frequently as ne 紧急求英语选择填空 1.  It is required that the machine That is the new machine -parts are too small to be seen. A w 请比较以下两个句子：That`s the new machine whose parts are too small t It is required that no smoking ______ in the school. The machine requires _____,so the workers are required _____ 英语翻译Subjected to heavy pressure ,cast iron will crack.The un