【单选题】Chemists find ____ to detect and measure the amount of chlorine in any given water supply.
【判断题】会计凭证按其来源不同可以分为外来会计凭证和自制会计凭证。( ) 【参考答案】会计凭证按照编制程序和用途一般可以分为原始凭证和记账凭证两类。原始凭证按其来源不同,可分为外来原始凭证和自制原始凭证。
【单选题】Chemists measure mass on ____ balance.
【单选题】Chemists, physicists and mathematicians are ______ known as scientists.
【简答题】Can you measure oil level? Which method is right, to measure ullage height or to measure oil depth?
【单选题】MAS系统(提供MAS业务的完备系统):包括MAS终端、MAS服务器和()。
【单选题】Not until 1959 ______ this compound.
A.
that chemists succeeded in obtaining
B.
did chemists succeed to obtain
C.
chemists succeeded in obtaining
D.
did chemists succeed in obtaining