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【判断题】
玻璃容器不能长时间存放碱液。A.
正确
B.
错误
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参考解析：
知识点：
皮皮学刷刷变学霸
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【简答题】A Mexican girl was questioned by her American teacher at an elementary school in the United States, “What were you doing just now over there?” The girl kept her head down and didn’t say anything. The ...
【简答题】"William, don't forget your towel!" Mom shouted as she applied
sunblock on the baby. William threw the folding chairs in the back of
the minivan and shouted through the garage door, "OK Mom!" He the...
【简答题】根据语境和首字母填写合适的单词。 Sandy walked into the 1) b_______ and turned on the shower. At first, the water felt 2) c_______. It helped her wake up. Then, as the water got hotter, she thought, "This shower feels...
【多选题】关于荧光酶免疫实验,正确的是
A.
标记物是荧光,检测的是酶
B.
标记物是酶,检测的是荧光
C.
常用的酶是HRP,底物是TMB
D.
常用的酶是ALP,底物是4-MUP
E.
常用的酶是ALP,底物是4-MUG
【单选题】She grabbed me______and pulled me onto the bus.
A.
by an arm
B.
by the arm
C.
on the arm
D.
with the arm
【简答题】药用植物采收期的确定依据? 第一,有效成分含量高峰期与产量高峰期一致时,可根据生产需要,在采收商品价值最高时采收。 第二,有效成分含量高峰期与产品器官产量高峰期不一致时,则应以有效成分含量与产量之积最大时为最适采收期。
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