Which of the following operation is correct? A: Eat in the laboratory B: Drink deionized water in the laboratory C: Wash hands carefully after the experiment D: Wear high heels in the laboratory

According to different operation methods, reservoir operation can be divided into： A: conventional reservoir operation and optimal reservoir operation B: flood control operation, hydropower generation operation, comprehensive operation C: long-term operation, short-term operation, real-time operation D: single reservoir operation and multiple reservoir operation

The connotation of mathematical operation is to solve mathematical problems according to operation rules on the basis of clarifying operation objects. It mainly includes understanding the operation object, mastering the operation rules, exploring the operation direction, selecting the operation method, designing the operation program and obtaining the operation result. Is this statement correct?

If the operation______carefully prepared，it would not have been successful. A: was not B: has not been C: had not been D: were not

If ______, the experiment will be successful. A: carefully doing B: B. it done carefully C: carefully done D: D. doing carefully

You should be more( ), you must write . A: careful; carefully B: carefully; careful C: careful; careful D: carefully; carefully

Uncle Sam is such a（__）driver that he always drives（__）. A: careful; careful B: carefully; careful C: careful; carefully D: carefully; carefully

--Does Betty write as ______ as Mary --No. Mary writes ______ than Betty. Mary writes ______ in our class. A: careful, more careful, the most careful B: carefully, more carefully, most carefully C: more carefully, carefully, most carefully

He doesn’t write as _____ as Tom. A: careful B: more carefully C: carefully D: most carefully

The boy plans his time ____ and____ than ever before. A: better; carefully B: better; more carefully C: more better; more carefully D: well; carefully