Stainless steel is material commonly used for temperatures up to 50℃; beyond that and for severe corrosive conditions other materials are requiredThe bold and italic word “that” probably means _____.
【单选题】听力原文:M: Betty, you speak several languages, don't you? W: Yes, I speak Spanish and French. M: And what helped you most in learning those languages? W: What helped me most... Well, I studied both langu...