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(lesson) in the morning and five in the afternoon.We have some (6) subjects at school,such as (例如) English,Chinese,and math.I don't like geography because it's not (7) interesting(interest).Do you think so? I have lunch with my friends at school.Then we g...
as previously mentioned. Samples entered via a stainless-steel nano-bore emitter. Positive mode was used for data collection with the spray voltage set to 2 kV and ion transfer capillary set at 290 °C. Alignment of chromatograms were done with the aid of the ...