柏氏矢量
参考答案：
通常将形成一个位错的晶体的相移矢量定义为该位错的柏氏矢量，用b表示。
请根据短文内容 , 判断正(A)误( B) 。
小题1:Mike was tired but very happy last Sunday.
小题2:Mike and his classmates met at the foot of the West Hill.
小题3:They walked to the West Hill singing, talking and laughing the whole morning.
小题4:After they got to the top of the hill, they could see small rivers and green rice in the fields below them.
小题5:They were not tired when they returned to the school.
科学家们认定二氧化碳是导致全球气候变暖的罪魁祸首之一。下表反映了我国为控制温室气体持续增加所付注的努力。
求：
（1）若二氧化碳的密度为1.8千克/米3，则我国通过造林累计吸收二氧化碳的体积。
（2）与上题二氧化碳相同体积的水的质量。
请根据短文内容 , 判断正(A)误( B) 。