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【单选题】
进行化学实验时必须要有规范、安全意识。下列做法错误的是（）。A.
用托盘天平称量样品时，放物品，右砝码
B.
容量瓶在使用之前检查是否漏液
C.
蒸馏装置中，冷凝水的方向是下口进水.上口出水
D.
在实验室中检验蔗糖、加碘食盐，可各取少量分别放在口里品尝一下
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【单选题】Read the article below about cost. Choose the best word to fill each gap, from A, B, C or D. For each question 19—33, mark one letter (A, B, C or D) on your Answer Sheet. There is an example at the be...
A.
to
B.
at
C.
of
D.
on
【简答题】选词并以其适当形式填空 strand complement appliance conformity deficient prosecution outfit transient appease outrage 1. We need to improve the quality of education so that our children will not l...
【单选题】The gap in price is too wide to be ________ over.
A.
bridge
B.
bridged
C.
fill
D.
filled
【单选题】—Read the article below about cost. —Choose the best word to fill each gap, from A, B, C or D. —For each question 19—33, mark one letter (A, B, C or D) on your Answer Sheet. —There is an example at th...
A.
to
B.
at
C.
of
D.
on
【单选题】?Read the article below about cost. ?Choose the best word to fill each gap, from A, B, C or D. ?For each question 19—33, mark one letter (A, B, C or D) on your Answer Sheet. ?There is an example at th...
A.
to
B.
at
C.
of
D.
on
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