头盆倾度不均，最多见于（）。 A.正常骨盆 B.均小骨盆 C.扁平骨盆 D.漏斗骨盆

男性，70岁。突发心悸、气促1天。查体：心率140次／分，节律不整。心电图示“心房颤动”。治疗首选（）

A.缓释异搏定

B.普萘洛尔（心得安）

C.毛花苷C

D.利多卡因

E.硝酸甘油

Americans’ (1) impulses keep generating surprises. Charitable giving plays an even larger role in the (2) . Demand for nonprofit services gets proportionately bigger as a locality’s (3) rises. The philanthropy of the wealthy may not hinge on tax (4) to the degree many believe. The US (5) the world in levels of charitable activity. Some experts see charity as a (6) trait of the US, more than (7) or business. But those forces may be (8) , as many nonprofits, from healthcare to classical music are selling (9) in a marketplace alongside for-profit (10) . Charity is no mere (11) activity. It pays off for society in ways that may (12) the rates of return on many traditional investments. Charity not only helps those on the (13) end but also strengthens the (14) of society at large. Moreover, it appears to make the givers themselves more (15) . The pattern that conservatives are better givers than (16) is less about politics than about charity-linked (17) most common to conservatives, religious commitment, marriage and children, and entrepreneurship. The main point is that more Americans, regardless of ideology, embrace giving as a tool for (18) . The urge to make a difference, and to take (19) in it, outweighs (20) considerations.

下列关于水的说法正确的是

A．水由氢元素和氧元素组成

B．H₂O分子由2个氢元素和1个氧元素组成

C．H₂O可以电离出H⁺和OH^-，所以H₂O是电解质

D．从海水中获得纯净水，可以通过蒸馏的方法

登革热的主要流行季节为（）

A.秋季

B.春季

C.夏秋雨季

D.冬春季

E.秋冬季

下列字符中，其ASCII码值最大的是

A．NUL

B．B

C．g

D．p