Ron was an engineer. He planned a change and tried the new job of teaching kids how to swim. Ron’s easy manner soon made him a full-time employee at the swim school.
Now, the 40 hours he works a week takes in weekends, early mornings and late afternoons. He earned around 25% less than he did in engineering. But, at 49, he says he has never been happier. “I’ve had a drop in pay, but I’ve cut back on spending, too. I seldom drive to work so don’t have to pay as much for petrol（汽油）. I don’t drink as much. I go walking in my lunch break and I’ve lost 20 kilos. I love going to work. The whole family is a lot happier.”
When one of his brothers called, offering to help him find “a real job”, he answered, “I don’t care. I know what I’m doing is good.”
He admits it was fearful making such a big change when there was the mortgage（分期付款）to pay and kids to clothe and feed, but in the end he feels it is a simple choice. “If you’re in a job you don’t like, get out. Money’s not everything. If you don’t like it, change－find something you’re going to be happy with.”
What’s Ron’s advice to the readers?（ ）
细节理解题。根据短文最后一段罗恩的话“If you’re in a job you don’t like, get out”可知，罗恩认为如果你不喜欢自己的工作，那直接走人就行了。故选C。
把10gMgCl2和MgSO4的混合物溶于适量水中，滴加2mol／L的BaCl2溶液至沉淀完全，共消耗BaCl2溶液25mL。求混合物中MgCl2和MgSO4的质量各是多少克
固定在匀强磁场中的正方形导线框abcd，各边长为1．其中ab是一段电阻为R的均匀电阻丝，其余3边均为电阻可忽略的铜线。磁场的磁感应强度为B，方向垂直纸面向里。现有一与ab段的材料、粗细、长度都相同的电阻丝PQ架在导体框上，如图所示。PQ以恒定速度方向如何
一小物块以速度v0=10m／s沿光滑地面滑行，然后沿光滑曲面上升到顶部水平的高台上，并由高台上飞出，如图所示。问当高台的高度h多大时，小物块飞行的水平距离最大这个距离是多少(g=10m／s2)
某晶体盐的水溶液呈浅绿色，在此溶液中通入氯气，溶液变为棕黄色，把所得棕黄色溶液分成两份：一份加入KSCN溶液，溶液变深红色；另一份加入BaCl2溶液，产生不溶于稀HNO3的白色沉淀，则该晶体盐的化学式是_______。
欲除去乙烷中的乙烯，可将混合气体通过盛有_______的洗气瓶；欲除去乙炔中的硫化氢，可将混合气体通过盛有_______的洗气瓶。
浓硝酸常盛装在棕色瓶中，且贮放在冷暗处，原因是_______，
碳酸氢钠溶液和烧碱溶液反应的离子方程式为_______。
常温下，氨水中存在的离子有_______。
在酸或碱存在的条件下，甲酸甲酯跟水发生水解反应的化学方程式为_______。
有下列几种气体：H2、O2、HCl、NO、NH3、CH4，其中通常情况下能用来和水做“喷泉”实验的是_______。
