【单选题】He has two children,______have become world-famous scientists.
【简答题】色彩的变化是创意本身得以深化或减弱;色彩可以帮助观者识别 ,理解 ,认识其 ,并留下深刻的印象和记忆
【单选题】用双硫腙比色法测定铅时用氰化钾,溶液 pH 必须控制在()
【简答题】Mr.Smith teaches English in a middle school.He has two children. They are . Mr. Smith calls them Mike and Dick. Jim and Alex are Mr. Smith’s students. They often go to see the twins and with them at h...
【单选题】The writers didn't answer the letter immediately because______.
A.
he had to prepare for a test
B.
he refused to answer it
【单选题】He has two children and ____ love him.
【单选题】He has two children, have become world-famous scientiests.
【单选题】He ______ think he was wrong ______ I showed the answer to him. [ ]