下列化学符号错误的是． A．2个氮原子：2N B．氦气：He　 C．氧化钙：Ca

第二节：语法填空（共10小题，每小题1.5分，满分15分）

阅读下面短文，根据上下文在空白处填上适当的词, 或使用括号中的词语的正确形式填空。

We high school students do have some growing pains, but we can get rid of them correctly and wisely.  31           , some of us are upset  32            their body styles and looks. It’s unnecessary and it’s not important at all. We needn’t care about it. It is one’s inner beauty   33           matters. Second, we sometimes seem to be misunderstood     34             our teachers, parents and classmates.    35        (face) with this, we can find a proper time to have a heart-to-heart talk with them, trying to remove the    36                (understand). Some of us have fewer friends. I think being open-minded and friendly will do you good. Third, we may fall behind others,  37           __ makes us stressed. Actually we can encourage    38             to work  39            (efficiency), full of determination. At last, some of us don’t have much pocket money, so they feel unhappy. Isn’t it strange? So long as we have some, that’s enough. And we can learn  40        to spend money.

患儿，男，5岁，于夜间11点来院就诊。哭闹不休，不断摇头、搔耳。家长诉以前无类似症状，1周前曾患感冒，近2日来出现以上症状。牵拉耳廓时未见症状加重。耳镜所见：整个鼓膜弥漫性充血透红、肿胀，向外膨出，正常标志不清，未见穿孔及分泌物。查体温39.5℃。

此病若预后不良，可发生的并发症是（）

A.鼓膜穿孔

B.中耳粘连症

C.鼓室硬化

D.慢性化脓性中耳炎

E.颅内并发症

F.颅外并发症

降钙素降低血钙和血磷的主要机制是（）

A.减弱溶骨过程，增强成骨过程，抑制肾小管的重吸收

B.增强溶骨过程，增强成骨过程，抑制肾小管的重吸收

C.增强溶骨过程，减弱成骨过程，抑制肾小管的重吸收

D.减弱溶骨过程，增强成骨过程，增强肾小管的重吸收

E.增强溶骨过程，减弱成骨过程，增强肾小管的重吸收

物业管理绩效评价修正指标中，( )是企业一定时期经营现金流量同净利润的比值，它反映了企业当期净利润中现金收益的保障程度，真实地反映了企业盈余的质量。

A．盈余现金保障倍数
B．主营业务利润率
C．成本费用利润率
D．应收账款周转率

封闭式运作的契约型股权投资基金，存续期内（）申购和赎回；开放式运作的契约型股权投资基金，存续期内（）申购和赎回。

A.可以；可以

B.可以；不能

C.不能；可以

D.不能；不能