共找到 1833 与________ 相关的结果，耗时0 ms
妇科盆腔肿块依声像图表现分为________、________和________3种类型。
多普勒超声心动图的定量分析包括________、________、________。
放射性核素显像有别于单纯形态结构的显像，它是一种独特的________显像。
呼吸困难按其发病机制和临床表现不同，分为_______、_______、________三种类型。
根据玻尔理论，氢原子中电子定态轨道的能量与主量子数n的________次方成反比。
真空中一半径为R的均匀带电半圆环所带电量为Q，在其圆心处的电势为________。
This passage is mainly about ________.A. freedom for teenagers in summer holidaysB. safety for teenagers in summer holidaysC. activities for teenager
For the sake of the safety, many parents send their kids to school ________.A. by carB. by busC. by trainD. by public transport
质点从t=0时刻开始由静止沿x轴运动，其加速度a=2ti(SI)，则当t=2s时该质点的速度大小为________m／s.
I prefer writing a term paper ________ taking an examination.A. thanB. toC. forD. rather than
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