TADS预报故障轴承的故障类型包括外圈、()、滚子、其他。
A.前盖
B.端盖
C.后挡
D.内圈
参考答案:D
Professor Smith, together with his assistants, ________on the project day and night to meet the deadline. [ ]
A. work
B. working
C. is working
D. are working
B-淋巴细胞和T-淋巴细胞在白细胞中的比重分别是()。
A.20%,80%
B.80%,20%
C.30%,70%
D.70%,30%