第3题: [单项选择]The cooling water temperature () over a period of 8 hours, and then shut down. A. should be gradually increased B. should be gradually reduced C. should be constantly kept D. should be varied up and down 参考答案:B
第27题: [单项选择]Early settlers usually moved their belongings west in wagon trains. A. relations B. supplies C. livestock D. possessions 参考答案:D 答案解析:题句中的画线词belongings与possessions同义,即“财产、所有物”之意。辨义:A. relations关系、亲戚;B.supplies供应品;C.livestock牲口。