— __ everybody here yesterday?
—No, Linda wasn’t here. [ ]
A. Do
B. Does
C. Is
D. was
答案:D
影响纱线弯曲能力的主要因素有:()、()、()和纱线结构。
驾驶机动车在交叉路口前变更车道时,应在进入实线区后,开启转向灯,变更车道。