索赔证据的基本要求是应该具有( )。 A．合理性、及时性、系统性、关联性、有效性

Teaching in No．1 Middle School，        ．

A．teachers work hard day and night and look older for their ages

B．students say that they are lucky to receive good education here

C．God is deeply moved by the teachers’devotion

D．too much pressure is given to teachers

The prices of new houses in our city have been ________than before, but they ______ well at present.

A．higher, still sell

B．lower, are not still sold

C．higher, don’t sell

D．cheaper, are not still sold

患者，女，65岁。额部锥形角化性皮损10年，初为质硬丘疹，后逐渐增大并弯曲，渐呈角锥形，无明显自觉症状。体格检查：前额深褐色角锥形角化性新生物，基底部直径2cm，高度约4cm，表面干燥无渗出。

该患者诊断应首先考虑（）。

A.表皮痣

B.脂溢性角化病

C.皮角

D.鳞状细胞癌

E.汗管瘤

在相同温度和压强下，1体积气体X₂和3体积气体Y₂化合成2体积气体Z，则Z的分子组成为（　　）

A．XY

B．X₃Y

C．XY₃

D．X₂Y₃

波轮式洗衣机比滚筒式洗衣机对衣物的磨损少，更适合于洗涤羊毛、丝绸等衣物，但其耗电多。