题目内容

______ it was late, he was still working in the office.

A. Even though
B. As though
C. As if
Despite

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We are _ to hear the _ story.

A. excited; exciting
B. exciting; excited
C. excited; excited
D. exciting; exciting

If you ______ my advice yesterday, you wouldn’t have made such a silly mistake.

A. followed
B. had followed
C. follow
D. would follow

吸收曲线是

A. 吸光物质浓度与吸光度之间的关系曲线
B. 吸光物质浓度与透光率之间的关系曲线
C. 入射光波长与吸光物质溶液厚度之间关系曲线
D. 入射光波长与吸光物质吸光度之间关系曲线

有两份不同浓度的某一有色络合物溶液,当液层厚度均为1.0cm时,对某一波长的透光率分别为:(a) 65.0%;(b)41.8%,该两份溶液的吸光度A1,A2分别为

A1=0.387, A2=0.179
B. A1=0.379 , A2=0.187
C. A1=0.187, A2=0.379
D. A1=0.179 , A2=0.387