高血压、糖尿病、苯丙酮尿症均为多基因遗传病。()

女性，50岁。偶然发现右乳有一小硬结节，不活动。超声检查：低回声实性结节，0.8cm×0.7cm，后方衰减明显，CDFI无血流信号，同侧腋窝淋巴结肿大。诊断首先要考虑（）

A.乳腺纤维腺瘤

B.乳腺囊性增生

C.慢性囊性乳腺增生

D.乳腺硬癌

E.乳腺髓样癌

下表给出了在常温常压下一些物质的密度，阅读后请判断下面一些结论，其中正确的是（　　）

A．固体的密度都比液体的大

B．不同的物质，密度一定不同

C．同种物质在不同状态下，其密度不同

D．质量相等的实心铜块和实心铅块，铜块的体积比铅块小

按《铁路工程地质勘察规范》（TB10012—2001）下述对物探方法的适用条件的叙述中（）不正确。

A.交流电磁法适用于接地困难、存在高屏蔽层的地段

B.折射波法应满足υ₂＞υ₁，岩层视倾角与临界角之和小于90°

C.反射波法应满足υ₁ρ₁=υ₂ρ₂，地层倾角3°～5°时最有利

D.地质雷达探测的地质体间介电常数差异不宜过大

下列折扣属于交易折扣的是（）。

A.功能折扣

B.季节折扣

C.数量折扣

D.现金折扣

Christmas is the anniversary of the birth of Christ, generally celebrated on December 25. It is one of the chief festivals of the Christian calendar and is (51) a social and family holiday. Christmas customs vary from (52) and among groups of different national (53) In most areas, however, homes and public places are (54) with evergreens, Christmas trees, (55) lights, and glittering ornaments. It is the busiest time of the year for merchants, and shops are filled (56) lavish displays and merchandise of all sorts. People send Christmas cards and buy gifts for their families and friends. Children look forward to (57) Santa Claus. They (58) their stockings on Christmas (59) and on Christmas morning they discover the gifts that have been left for them during the night. In the afternoon, families gather to (60) presents and to share the traditional Christmas dinner.

60().

A.transfer 

B.change 

C.transform 

D.exchange