The plus sign is used in addition and the minus is used in subtraction.加号用于加法;减号用于减法....using concrete objects to teach addition and subtraction.用实物来教加减法There will be simple tests in addition, subtraction, multiplication...
快速看过岩块, 寻找岩质较松有裂缝的地方.Scan the rock, look for cracks that create a loose area.目的确定天然裂缝对人工压裂裂缝的影响.Purpose To determine the effect of in - situ fractures upon artificial fracturized ones.对裂缝的出现和预应力的变化规律作了相应的阐释.The changes o...
Microcalorimetry measurements are used to determine various energy relationships.微热量测量用来决定各种能量关系.Low voltage measurement applications include standard cell comparisons and high resolution temperature measurements and mic...
From the slope below, the wild goats bleated faintly.山坡下面，野山羊咩咩地轻声叫着。"I don't want it," Eric bleated.“我不想要它，”埃里克微弱地尖声说。The lost lamb bleated.迷路的小羊咩咩的叫....