大厨餐厅转外客帐操作需由服务员填写同意转账单，由（）签字确认，经前厅经理签字后交财务

已知等腰三角形的周长为17，一边长为4，则它的另两边长为           ．

下列一些有关实验操作的说法正确的是（　　）

A．为加快过滤速度，应用玻璃棒搅拌漏斗中的过滤液

B．用托盘天平称量固体时，应将砝码放在右盘

C．给固体加热时，试管口应向上倾斜

D．量取5mL某溶液应选用100mL的量筒

With the publication of ________, Theodore Dreiser was launching himself upon a long career that would ultimately make him one of the most significant American writers of the school later known as literary naturalism.

A．Sister Carrie

B．The Titan

C．An American Tragedy

D．The Stoic

什么是爱音乐？

恒重系指相邻两次称取间隔时间大于（）的情况下，前后两次称量之差小于该项试验所要求的称量精密度。

A.1h

B.2h

C.3h

D.4h