同一节井架上,相对两面上的斜杆可以同时拆除。()
参考答案:错
All morning as she waited for the medical report from the doctor, her nervousness ________.
A.has grown
B.is growing
C.grew
D.had grown
在3支试管中分别放有:①1mL乙酸乙酯和3mL水 ②1mL溴苯和3mL水 ③1mL乙酸和3mL水.图中三支试管从左到右的排列顺序为( )
A.①②③
B.①③②
C.②①③
D.②③①