下列物质长期露置在空气中,溶液质量和溶质质量分数都会减少的是( )
A.浓硫酸
B.氢氧化钠溶液
C.浓盐酸
D.食盐溶液
答案:C
Although there were only five athletes ____ in the race, it was a rather exciting one.
[ ]
A. competing
B. having been competed
C. to compete
D. to be competed
小路特别爱好打篮球,而且身体条件、技术各方面都不错。他的爸爸希望他以后学习篮球专业。所以他平时上课总是不好好学习,要么和同学讲话,要么睡觉。别人批评他,他总是振振有词:我是去打篮球的,学不学文化课无所谓。
(1)他的做法对吗?如果不对,错在哪里?
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(2)打篮球和学习文化课矛盾吗?
(3)假如你是他的好朋友,你有哪些好的办法帮助他改正错误?