下列实例中，属于用热传递的方法改变物体内能的是（ ） A．地球外的石块，坠入地球

Early this morning we were waiting eager at the school gate for two American guests．They were from an university in New York．All of them were going to give us a lecture．At half past seven，Mr.．Jackson，along by his assistant，arrived．As long as their car stopped，we all went up and said hello to them．Then followed our headmaster，they came to the lecture room in there they gave us a lecture on “American Culture”and another one on “American Senior High School”．They spoke slowly，clearly and loudly，so they could understand most of the lectures．The lectures had interested us a lot．Before that we had a free talk with them and many questions．

将填制的卡直接挂在物料的垛位上。挂放位置要（）、牢固。此法便于随时与实物核对，有利于物料进出业务的及时进行，可以提高保管人员的工作效率。

A.不明显

B.正确

C.明显

D.模糊

采用信用证与托收相结合的支付方式时，全套货运单据应：（）

A.随附托收项下收款

B.随附信用证项下收款

C.直接寄往入口商

D.留在卖方

以优惠价出售日常家用小商品的零售商通常有上千雇员，其中大多数只能领取最低工资。随着国家法定的最低工资额的提高，零售商的人力成本也随之大幅度地提高。但是，零售商的利润非但没有降低，反而提高了。以下哪项如果为真，最有助于解释上述看来矛盾的现象（）

A．上述零售商的顾客基本上是领取最低工资的人

B．人力成本只占零售商的经营成本的一半

C．在国家提高最低工资额的法令实施后，除了人力成本以外，其他零售经营成本也有所提高

D．零售商的雇员有一部分来自农村，他们基本都拿最低工资

男，25岁，不慎摔倒，左肩部疼痛不敢活动来诊。体检：左肩部疼痛肿胀，活动受限，上臂外展位弹性固定，肩峰下空虚，Dugas征阳性。

首选的治疗方法是

A．Hippocrates法复位

B．切开复位

C．切开复位并关节囊重叠缝合术

D．切开复位，肩胛下肌止点外移术以增强关节囊前壁

E．以上说法都不对