焊接带有气压的锅炉储气筒及带（），会造成火灾爆炸事故
A.附件
B.零件
C.部件
参考答案：A
关于对数视力表不正确的是（）。
A.便于进行科学的视力统计
B.采用4分记录法
C.视力计算是递减的
D.视标按几何级增进
E.相邻两行视标大小之比恒等
She had a computer at home, and her parents desired that she all her work at home. [ ]
A. do
B. does
C. must do
D. would do
