Is English a _______for the job?
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I'll have to use a lot of English _____ I get the job.
A. if
B. what
C. why
Why does Bill spend a lot of time to study English?
A. Because he is interested in English
Because he's apply for a job in an international company.
Is English a must for the job?
A. Yes, it is.
B. No, it isn't
分光光度法中不影响摩尔吸光系数的是( )
A. 溶液温度
B. 入射光波长
C. 液层的厚度
D. 物质的特性