【单选题】Some pumps use packing as sealing glandThe gland should be _____.
A.
slack enough to allow slight leakage of fluid
C.
brought up tight so as not to allow any leakage
D.
fitted with a relief valve
【单选题】Details such as the manner of packing , the kinds of packing materials and the burden of packing cost should be unmistakably ___ the contract.
【单选题】Why should packing be attractive according to Mr. Smith?
A.
Because the pottery is fragile.
B.
Because attractive packing helps sales.
C.
Because the customers ask for it.
【单选题】地高辛t1/2为33h,每日给维持量,达稳态血药浓度的时间约
【单选题】The woolen gloves should()in twenty boxes.
【多选题】在利率一定的条件下,随着预期使用年限的增加,下列表述正确的是()
【单选题】( )指中东罗斯山脉以南、地中海东岸、阿拉伯沙漠以北和美索不达米亚以难的一大片地区。
【多选题】在利率一定的条件下,随着预期使用年限的增加,下列表述不正确的是( )
【单选题】在利率一定的条件下,随着预期使用年限的增加,下列表述正确的是( )。