以下说法错误的是（）
A.酊剂、醑剂等与某些药物水溶液配伍时有效成分可能析出
B.血液不透明，在产生沉淀混浊时不易观察，且其成分复杂，与药物的注射液混合后可能引起溶血、凝聚等现象
C.氯化钠原料中若含有微量钙，与枸橼酸钠配伍时产生枸橼酸钙而沉淀
D.苯妥英钠注射液可因吸收空气中的二氧化碳而析出沉淀
E.两种注射剂配伍使用时，如肉眼观察不到变化，则可放心使用
参考答案：E
It amazed me—every time I saw Joe，he was smiling.It didn’t ____ whether he had to stop at a stop light，or if he were the seventh person in ____ at the bank，and the service stopped just before he got there.Joe ___ smiled.It made me wonder why he seemed so ____ every day. Having observed Joe with other people，I ____ something else also.Joe asked people how they were doing，and really seemed to listen to their ____.If someone were hurting，he had __7__ for him and kind words，and offered to ____ in any way he could. It made me think...What if I tried to smile more？A(n) ____ of sorts began when I went to the grocery store.I smiled as I went up and down the aisles...and people I didn’t even ___ smiled back at me.Some even ____！The little kid in the cart(购物车) who was giving his mother a ____ time saw me smile and ____ talking...and，you guessed it.He made a shy little attempt at a smile.The man in the handicapped(残疾的) cart ____ a person to reach something...I could get that for him.The smile even transferred over to him，and he ____me. As I drove home，I was smiling.I ____ what I had just learned，and when someone passed me and gave me a(n) ____，I smiled at him.He looked puzzled. Now I know a smile is a small thing，but what if we were all to try to smile a few more times each day？I couldn’t believe how ___ I felt.Nothing in my life had changed，____ maybe it had.For what I learned was that such a small thing could ____ not only my spirits，but those around me as well.
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