Almost all of us have unpleasant habits. We all want to get rid of(摆脱) them, but we don’t know proper ways. Here’s some advice.

●Write down all the reasons why you want to stop some behavior. Look at the reasons very often.

●It’s clever to do something else when you want to stop your bad habits. If you get angry easily, for example, you can go out for a walk.

●Decide what you’ll do to reward(奖励) yourself if you really get rid of your bad habits.

●If you get too heavy, keep junk food out of your house.

●Bad habits develop over years, so you can’t get rid of them very soon. So you should be patient.

●Don’t be afraid to ask others for support. You can talk to your friends, family or other people. When you talk to them, they might be able to provide some advice that you can’t get from yourself.

下列溶液中的氯离子数目与50 mL 1 mol·L^－1的AlCl₃溶液中氯离子数目相等的是

A．150 mL 1 mol·L^－1的KClO₃

B．150 mL 3 mol·L^－1的KCl

C．75 mL 2 mol·L^－1的CaCl₂

D．75 mL 2 mol·L^－1的NH₄Cl