If someone spends his or her time, effort and money writing a book, for example, he or she deserves _______ for it.
A：paying
B：to pay
C：having been paid
D：being paid
三角形三边长为a、b、c均为正整数，且a≤b≤c，当b=2时，符合上述条件的三角形有（ ）个.
氯化钠在生活、生产中有广泛应用．下列做法或说法中错误的是（ ）
新疆地区昼夜温差大，瓜果特别甜，是因为（ ）
