物资储备定额的种类，按其在生产中所起的作用分，可分为（）储备定额。
A.经常
B.日常
C.保险
D.季节
参考答案：A, C, D
He ______ reading, but he ______ to read this novel (小说). [ ]
A. enjoys; doesn't enjoy
B. likes; dislikes
C. likes; doesn't dislike
D. enjoys; likes
加热炉中常采用各种热工仪表对（）参数进行检测。
A、温度
B、压力
C、流量
D、液位
