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请回答（8）题查看材料

A. at random
B. in brief
C. on purpose
D. so far

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Bob：Fine．It never rained during my stay here．

A. How about the weather
B. How is the weather
C. What is the weather
D. What do you think of the weather

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表2-5
测得水样中BaP以高度表示的吸光度为0.862 mAU。在同一水样中加入20μL BaP标准溶液(20mg/L)，加标后测得试样的Height(mAU)=6.584。试计算水样中BaP的含量和实验的加标回收率(水样总体积1mL，不考虑加标体积变化)。

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Wearing a seat belt in a vehicle （).

A. reduces road accidents by more than half
B. saves lives while driving at a speed up t0 30 miles per hour
C. reduces the death rate in traffic accidents
D. saves more than 15000 lives each year

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The woman uses her personal experiences with the drug Ecstasy to warn others of its dangerous effects. She grew up in a small town in Pennsylvania but moved to New York City to a acting school, and it was here that she first came into c with drugs. Many of her school friends were drug users and, in an effort to f in, she began to use them too. Her story is t of many drug addicts. She went from someone who used drugs for fun to someone who couldn't live without them. Finally she had some kind of a b. Luckily for her, her mother drove to New York to r her and she ended up back in Pennsylvania in hospital. She was s with horror when she saw her brain scan which showed that Ecstasy had had p effects on her brain.

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请回答（8）题 查看材料

A. at random B. in brief C. on purpose D. so far

Bob：Fine．It never rained during my stay here．

表2-5测得水样中BaP以高度表示的吸光度为0.862 mAU。在同一水样中加入20μL BaP标准溶液(20mg/L)，加标后测得试样的Height(mAU)=6.584。试计算水样中BaP的含量和实验的加标回收率(水样总体积1mL，不考虑加标体积变化)。

Wearing a seat belt in a vehicle （).

请回答（8）题查看材料

A. at random
B. in brief
C. on purpose
D. so far

表2-5
测得水样中BaP以高度表示的吸光度为0.862 mAU。在同一水样中加入20μL BaP标准溶液(20mg/L)，加标后测得试样的Height(mAU)=6.584。试计算水样中BaP的含量和实验的加标回收率(水样总体积1mL，不考虑加标体积变化)。