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【单选题】
取用试剂时,错误的说法是A.
不能用手接触试剂,以免危害健康和沾污试剂
B.
瓶塞应倒置桌面上,以免弄脏,取用试剂后,立即,将试剂瓶放回原处,标签朝外
C.
要用干净的药匙取固体试剂,用过的药匙要洗净擦干才能再用
D.
多取的试剂可倒瓶,避免浪费(会造成原试剂瓶中污染)
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反馈参考答案：
举一反三
【简答题】synonym:effect
【简答题】Dirctions: Fill in the blanks with the Ways of Developing Paragraphs labeled from a to h. a. by time b. by space c. by process d. by examples or generalization e. by comparison and contrast f. by caus...
【单选题】Which phrase shows that the writer was worried that she might have lost?
A.
A tingle through the body.
B.
Clapping and shouting.
C.
Missed out.
D.
Beating loudly.
【单选题】Questions6-10, choose the synonym of the underlined words Many fear that budget cuts will have an adverse effect on education.
A.
adversarial
B.
detrimental
C.
reverse
D.
positive
【简答题】专业性搜索引擎有eMlecules、chemBlink 、CiteSeerX、INFMINE。 判断对错
【单选题】Which phrase shows that the writer would put all her efforts into the race?
A.
Arms aloft and fists clenched.
B.
Run my heart out.
C.
Unified with the crowd.
D.
Eclipsed by victory or failure.
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